20682720

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{271}}^1$

素因数の和:345

約数の個数: 144

約数和(自身を含む): 72176832

約数和(自身を除く): 51494112

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 40, 45, 48, 53, 60, 72, 80, 90, 96, 106, 120, 144, 159, 160, 180, 212, 240, 265, 271, 288, 318, 360, 424, 477, 480, 530, 542, 636, 720, 795, 813, 848, 954, 1060, 1084, 1272, 1355, 1440, 1590, 1626, 1696, 1908, 2120, 2168, 2385, 2439, 2544, 2710, 3180, 3252, 3816, 4065, 4240, 4336, 4770, 4878, 5088, 5420, 6360, 6504, 7632, 8130, 8480, 8672, 9540, 9756, 10840, 12195, 12720, 13008, 14363, 15264, 16260, 19080, 19512, 21680, 24390, 25440, 26016, 28726, 32520, 38160, 39024, 43089, 43360, 48780, 57452, 65040, 71815, 76320, 78048, 86178, 97560, 114904, 129267, 130080, 143630, 172356, 195120, 215445, 229808, 258534, 287260, 344712, 390240, 430890, 459616, 517068, 574520, 646335, 689424, 861780, 1034136, 1149040, 1292670, 1378848, 1723560, 2068272, 2298080, 2585340, 3447120, 4136544, 5170680, 6894240, 10341360, 20682720]

約数ペア:

[(1, 20682720), (2, 10341360), (3, 6894240), (4, 5170680), (5, 4136544), (6, 3447120), (8, 2585340), (9, 2298080), (10, 2068272), (12, 1723560), (15, 1378848), (16, 1292670), (18, 1149040), (20, 1034136), (24, 861780), (30, 689424), (32, 646335), (36, 574520), (40, 517068), (45, 459616), (48, 430890), (53, 390240), (60, 344712), (72, 287260), (80, 258534), (90, 229808), (96, 215445), (106, 195120), (120, 172356), (144, 143630), (159, 130080), (160, 129267), (180, 114904), (212, 97560), (240, 86178), (265, 78048), (271, 76320), (288, 71815), (318, 65040), (360, 57452), (424, 48780), (477, 43360), (480, 43089), (530, 39024), (542, 38160), (636, 32520), (720, 28726), (795, 26016), (813, 25440), (848, 24390), (954, 21680), (1060, 19512), (1084, 19080), (1272, 16260), (1355, 15264), (1440, 14363), (1590, 13008), (1626, 12720), (1696, 12195), (1908, 10840), (2120, 9756), (2168, 9540), (2385, 8672), (2439, 8480), (2544, 8130), (2710, 7632), (3180, 6504), (3252, 6360), (3816, 5420), (4065, 5088), (4240, 4878), (4336, 4770)]