20631940

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{37}}^1\times {\mathrm{569}}^1$

素因数の和:629

約数の個数: 72

約数和(自身を含む): 51854040

約数和(自身を除く): 31222100

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 37, 49, 70, 74, 98, 140, 148, 185, 196, 245, 259, 370, 490, 518, 569, 740, 980, 1036, 1138, 1295, 1813, 2276, 2590, 2845, 3626, 3983, 5180, 5690, 7252, 7966, 9065, 11380, 15932, 18130, 19915, 21053, 27881, 36260, 39830, 42106, 55762, 79660, 84212, 105265, 111524, 139405, 147371, 210530, 278810, 294742, 421060, 557620, 589484, 736855, 1031597, 1473710, 2063194, 2947420, 4126388, 5157985, 10315970, 20631940]

約数ペア:

[(1, 20631940), (2, 10315970), (4, 5157985), (5, 4126388), (7, 2947420), (10, 2063194), (14, 1473710), (20, 1031597), (28, 736855), (35, 589484), (37, 557620), (49, 421060), (70, 294742), (74, 278810), (98, 210530), (140, 147371), (148, 139405), (185, 111524), (196, 105265), (245, 84212), (259, 79660), (370, 55762), (490, 42106), (518, 39830), (569, 36260), (740, 27881), (980, 21053), (1036, 19915), (1138, 18130), (1295, 15932), (1813, 11380), (2276, 9065), (2590, 7966), (2845, 7252), (3626, 5690), (3983, 5180)]