21020996900

素因数分解:

$2^2\times 5^2\times {\mathrm{151}}^1\times {\mathrm{157}}^1\times {\mathrm{8867}}^1$

素因数の和:9189

約数の個数: 72

約数和(自身を含む): 46215333696

約数和(自身を除く): 25194336796

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 151, 157, 302, 314, 604, 628, 755, 785, 1510, 1570, 3020, 3140, 3775, 3925, 7550, 7850, 8867, 15100, 15700, 17734, 23707, 35468, 44335, 47414, 88670, 94828, 118535, 177340, 221675, 237070, 443350, 474140, 592675, 886700, 1185350, 1338917, 1392119, 2370700, 2677834, 2784238, 5355668, 5568476, 6694585, 6960595, 13389170, 13921190, 26778340, 27842380, 33472925, 34802975, 66945850, 69605950, 133891700, 139211900, 210209969, 420419938, 840839876, 1051049845, 2102099690, 4204199380, 5255249225, 10510498450, 21020996900]

約数ペア:

[(1, 21020996900), (2, 10510498450), (4, 5255249225), (5, 4204199380), (10, 2102099690), (20, 1051049845), (25, 840839876), (50, 420419938), (100, 210209969), (151, 139211900), (157, 133891700), (302, 69605950), (314, 66945850), (604, 34802975), (628, 33472925), (755, 27842380), (785, 26778340), (1510, 13921190), (1570, 13389170), (3020, 6960595), (3140, 6694585), (3775, 5568476), (3925, 5355668), (7550, 2784238), (7850, 2677834), (8867, 2370700), (15100, 1392119), (15700, 1338917), (17734, 1185350), (23707, 886700), (35468, 592675), (44335, 474140), (47414, 443350), (88670, 237070), (94828, 221675), (118535, 177340)]