20783360

素因数分解:

$2^8\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1249}}^1$

素因数の和:1283

約数の個数: 72

約数和(自身を含む): 53655000

約数和(自身を除く): 32871640

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 256, 260, 320, 416, 520, 640, 832, 1040, 1249, 1280, 1664, 2080, 2498, 3328, 4160, 4996, 6245, 8320, 9992, 12490, 16237, 16640, 19984, 24980, 32474, 39968, 49960, 64948, 79936, 81185, 99920, 129896, 159872, 162370, 199840, 259792, 319744, 324740, 399680, 519584, 649480, 799360, 1039168, 1298960, 1598720, 2078336, 2597920, 4156672, 5195840, 10391680, 20783360]

約数ペア:

[(1, 20783360), (2, 10391680), (4, 5195840), (5, 4156672), (8, 2597920), (10, 2078336), (13, 1598720), (16, 1298960), (20, 1039168), (26, 799360), (32, 649480), (40, 519584), (52, 399680), (64, 324740), (65, 319744), (80, 259792), (104, 199840), (128, 162370), (130, 159872), (160, 129896), (208, 99920), (256, 81185), (260, 79936), (320, 64948), (416, 49960), (520, 39968), (640, 32474), (832, 24980), (1040, 19984), (1249, 16640), (1280, 16237), (1664, 12490), (2080, 9992), (2498, 8320), (3328, 6245), (4160, 4996)]