21968540

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{1637}}^1$

素因数の和:1718

約数の個数: 48

約数和(自身を含む): 51184224

約数和(自身を除く): 29215684

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 61, 110, 122, 220, 244, 305, 610, 671, 1220, 1342, 1637, 2684, 3274, 3355, 6548, 6710, 8185, 13420, 16370, 18007, 32740, 36014, 72028, 90035, 99857, 180070, 199714, 360140, 399428, 499285, 998570, 1098427, 1997140, 2196854, 4393708, 5492135, 10984270, 21968540]

約数ペア:

[(1, 21968540), (2, 10984270), (4, 5492135), (5, 4393708), (10, 2196854), (11, 1997140), (20, 1098427), (22, 998570), (44, 499285), (55, 399428), (61, 360140), (110, 199714), (122, 180070), (220, 99857), (244, 90035), (305, 72028), (610, 36014), (671, 32740), (1220, 18007), (1342, 16370), (1637, 13420), (2684, 8185), (3274, 6710), (3355, 6548)]