20771360

素因数分解:

$2^5\times 5^1\times {\mathrm{131}}^1\times {\mathrm{991}}^1$

素因数の和:1137

約数の個数: 48

約数和(自身を含む): 49496832

約数和(自身を除く): 28725472

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 131, 160, 262, 524, 655, 991, 1048, 1310, 1982, 2096, 2620, 3964, 4192, 4955, 5240, 7928, 9910, 10480, 15856, 19820, 20960, 31712, 39640, 79280, 129821, 158560, 259642, 519284, 649105, 1038568, 1298210, 2077136, 2596420, 4154272, 5192840, 10385680, 20771360]

約数ペア:

[(1, 20771360), (2, 10385680), (4, 5192840), (5, 4154272), (8, 2596420), (10, 2077136), (16, 1298210), (20, 1038568), (32, 649105), (40, 519284), (80, 259642), (131, 158560), (160, 129821), (262, 79280), (524, 39640), (655, 31712), (991, 20960), (1048, 19820), (1310, 15856), (1982, 10480), (2096, 9910), (2620, 7928), (3964, 5240), (4192, 4955)]