20021440

素因数分解:

$2^6\times 5^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{89}}^1$

素因数の和:162

約数の個数: 112

約数和(自身を含む): 52120800

約数和(自身を除く): 32099360

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 37, 38, 40, 64, 74, 76, 80, 89, 95, 148, 152, 160, 178, 185, 190, 296, 304, 320, 356, 370, 380, 445, 592, 608, 703, 712, 740, 760, 890, 1184, 1216, 1406, 1424, 1480, 1520, 1691, 1780, 2368, 2812, 2848, 2960, 3040, 3293, 3382, 3515, 3560, 5624, 5696, 5920, 6080, 6586, 6764, 7030, 7120, 8455, 11248, 11840, 13172, 13528, 14060, 14240, 16465, 16910, 22496, 26344, 27056, 28120, 28480, 32930, 33820, 44992, 52688, 54112, 56240, 62567, 65860, 67640, 105376, 108224, 112480, 125134, 131720, 135280, 210752, 224960, 250268, 263440, 270560, 312835, 500536, 526880, 541120, 625670, 1001072, 1053760, 1251340, 2002144, 2502680, 4004288, 5005360, 10010720, 20021440]

約数ペア:

[(1, 20021440), (2, 10010720), (4, 5005360), (5, 4004288), (8, 2502680), (10, 2002144), (16, 1251340), (19, 1053760), (20, 1001072), (32, 625670), (37, 541120), (38, 526880), (40, 500536), (64, 312835), (74, 270560), (76, 263440), (80, 250268), (89, 224960), (95, 210752), (148, 135280), (152, 131720), (160, 125134), (178, 112480), (185, 108224), (190, 105376), (296, 67640), (304, 65860), (320, 62567), (356, 56240), (370, 54112), (380, 52688), (445, 44992), (592, 33820), (608, 32930), (703, 28480), (712, 28120), (740, 27056), (760, 26344), (890, 22496), (1184, 16910), (1216, 16465), (1406, 14240), (1424, 14060), (1480, 13528), (1520, 13172), (1691, 11840), (1780, 11248), (2368, 8455), (2812, 7120), (2848, 7030), (2960, 6764), (3040, 6586), (3293, 6080), (3382, 5920), (3515, 5696), (3560, 5624)]