20427680

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1$

素因数の和:119

約数の個数: 192

約数和(自身を含む): 62995968

約数和(自身を除く): 42568288

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 16, 20, 23, 26, 28, 32, 35, 40, 46, 52, 56, 61, 65, 70, 80, 91, 92, 104, 112, 115, 122, 130, 140, 160, 161, 182, 184, 208, 224, 230, 244, 260, 280, 299, 305, 322, 364, 368, 416, 427, 455, 460, 488, 520, 560, 598, 610, 644, 728, 736, 793, 805, 854, 910, 920, 976, 1040, 1120, 1196, 1220, 1288, 1403, 1456, 1495, 1586, 1610, 1708, 1820, 1840, 1952, 2080, 2093, 2135, 2392, 2440, 2576, 2806, 2912, 2990, 3172, 3220, 3416, 3640, 3680, 3965, 4186, 4270, 4784, 4880, 5152, 5551, 5612, 5980, 6344, 6440, 6832, 7015, 7280, 7930, 8372, 8540, 9568, 9760, 9821, 10465, 11102, 11224, 11960, 12688, 12880, 13664, 14030, 14560, 15860, 16744, 17080, 18239, 19642, 20930, 22204, 22448, 23920, 25376, 25760, 27755, 28060, 31720, 33488, 34160, 36478, 39284, 41860, 44408, 44896, 47840, 49105, 55510, 56120, 63440, 66976, 68320, 72956, 78568, 83720, 88816, 91195, 98210, 111020, 112240, 126880, 127673, 145912, 157136, 167440, 177632, 182390, 196420, 222040, 224480, 255346, 291824, 314272, 334880, 364780, 392840, 444080, 510692, 583648, 638365, 729560, 785680, 888160, 1021384, 1276730, 1459120, 1571360, 2042768, 2553460, 2918240, 4085536, 5106920, 10213840, 20427680]

約数ペア:

[(1, 20427680), (2, 10213840), (4, 5106920), (5, 4085536), (7, 2918240), (8, 2553460), (10, 2042768), (13, 1571360), (14, 1459120), (16, 1276730), (20, 1021384), (23, 888160), (26, 785680), (28, 729560), (32, 638365), (35, 583648), (40, 510692), (46, 444080), (52, 392840), (56, 364780), (61, 334880), (65, 314272), (70, 291824), (80, 255346), (91, 224480), (92, 222040), (104, 196420), (112, 182390), (115, 177632), (122, 167440), (130, 157136), (140, 145912), (160, 127673), (161, 126880), (182, 112240), (184, 111020), (208, 98210), (224, 91195), (230, 88816), (244, 83720), (260, 78568), (280, 72956), (299, 68320), (305, 66976), (322, 63440), (364, 56120), (368, 55510), (416, 49105), (427, 47840), (455, 44896), (460, 44408), (488, 41860), (520, 39284), (560, 36478), (598, 34160), (610, 33488), (644, 31720), (728, 28060), (736, 27755), (793, 25760), (805, 25376), (854, 23920), (910, 22448), (920, 22204), (976, 20930), (1040, 19642), (1120, 18239), (1196, 17080), (1220, 16744), (1288, 15860), (1403, 14560), (1456, 14030), (1495, 13664), (1586, 12880), (1610, 12688), (1708, 11960), (1820, 11224), (1840, 11102), (1952, 10465), (2080, 9821), (2093, 9760), (2135, 9568), (2392, 8540), (2440, 8372), (2576, 7930), (2806, 7280), (2912, 7015), (2990, 6832), (3172, 6440), (3220, 6344), (3416, 5980), (3640, 5612), (3680, 5551), (3965, 5152), (4186, 4880), (4270, 4784)]