21105040

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{827}}^1$

素因数の和:880

約数の個数: 80

約数和(自身を含む): 55442880

約数和(自身を除く): 34337840

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 29, 40, 44, 55, 58, 80, 88, 110, 116, 145, 176, 220, 232, 290, 319, 440, 464, 580, 638, 827, 880, 1160, 1276, 1595, 1654, 2320, 2552, 3190, 3308, 4135, 5104, 6380, 6616, 8270, 9097, 12760, 13232, 16540, 18194, 23983, 25520, 33080, 36388, 45485, 47966, 66160, 72776, 90970, 95932, 119915, 145552, 181940, 191864, 239830, 263813, 363880, 383728, 479660, 527626, 727760, 959320, 1055252, 1319065, 1918640, 2110504, 2638130, 4221008, 5276260, 10552520, 21105040]

約数ペア:

[(1, 21105040), (2, 10552520), (4, 5276260), (5, 4221008), (8, 2638130), (10, 2110504), (11, 1918640), (16, 1319065), (20, 1055252), (22, 959320), (29, 727760), (40, 527626), (44, 479660), (55, 383728), (58, 363880), (80, 263813), (88, 239830), (110, 191864), (116, 181940), (145, 145552), (176, 119915), (220, 95932), (232, 90970), (290, 72776), (319, 66160), (440, 47966), (464, 45485), (580, 36388), (638, 33080), (827, 25520), (880, 23983), (1160, 18194), (1276, 16540), (1595, 13232), (1654, 12760), (2320, 9097), (2552, 8270), (3190, 6616), (3308, 6380), (4135, 5104)]