21503770

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{977}}^1$

素因数の和:1086

約数の個数: 32

約数和(自身を含む): 40559616

約数和(自身を除く): 19055846

約数列:

[1, 2, 5, 10, 31, 62, 71, 142, 155, 310, 355, 710, 977, 1954, 2201, 4402, 4885, 9770, 11005, 22010, 30287, 60574, 69367, 138734, 151435, 302870, 346835, 693670, 2150377, 4300754, 10751885, 21503770]

約数ペア:

[(1, 21503770), (2, 10751885), (5, 4300754), (10, 2150377), (31, 693670), (62, 346835), (71, 302870), (142, 151435), (155, 138734), (310, 69367), (355, 60574), (710, 30287), (977, 22010), (1954, 11005), (2201, 9770), (4402, 4885)]