19965920

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{331}}^1$

素因数の和:388

約数の個数: 96

約数和(自身を含む): 52708320

約数和(自身を除く): 32742400

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 29, 32, 40, 52, 58, 65, 80, 104, 116, 130, 145, 160, 208, 232, 260, 290, 331, 377, 416, 464, 520, 580, 662, 754, 928, 1040, 1160, 1324, 1508, 1655, 1885, 2080, 2320, 2648, 3016, 3310, 3770, 4303, 4640, 5296, 6032, 6620, 7540, 8606, 9599, 10592, 12064, 13240, 15080, 17212, 19198, 21515, 26480, 30160, 34424, 38396, 43030, 47995, 52960, 60320, 68848, 76792, 86060, 95990, 124787, 137696, 153584, 172120, 191980, 249574, 307168, 344240, 383960, 499148, 623935, 688480, 767920, 998296, 1247870, 1535840, 1996592, 2495740, 3993184, 4991480, 9982960, 19965920]

約数ペア:

[(1, 19965920), (2, 9982960), (4, 4991480), (5, 3993184), (8, 2495740), (10, 1996592), (13, 1535840), (16, 1247870), (20, 998296), (26, 767920), (29, 688480), (32, 623935), (40, 499148), (52, 383960), (58, 344240), (65, 307168), (80, 249574), (104, 191980), (116, 172120), (130, 153584), (145, 137696), (160, 124787), (208, 95990), (232, 86060), (260, 76792), (290, 68848), (331, 60320), (377, 52960), (416, 47995), (464, 43030), (520, 38396), (580, 34424), (662, 30160), (754, 26480), (928, 21515), (1040, 19198), (1160, 17212), (1324, 15080), (1508, 13240), (1655, 12064), (1885, 10592), (2080, 9599), (2320, 8606), (2648, 7540), (3016, 6620), (3310, 6032), (3770, 5296), (4303, 4640)]