21373960

素因数分解:

$2^3\times 5^1\times {\mathrm{131}}^1\times {\mathrm{4079}}^1$

素因数の和:4221

約数の個数: 32

約数和(自身を含む): 48470400

約数和(自身を除く): 27096440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 131, 262, 524, 655, 1048, 1310, 2620, 4079, 5240, 8158, 16316, 20395, 32632, 40790, 81580, 163160, 534349, 1068698, 2137396, 2671745, 4274792, 5343490, 10686980, 21373960]

約数ペア:

[(1, 21373960), (2, 10686980), (4, 5343490), (5, 4274792), (8, 2671745), (10, 2137396), (20, 1068698), (40, 534349), (131, 163160), (262, 81580), (524, 40790), (655, 32632), (1048, 20395), (1310, 16316), (2620, 8158), (4079, 5240)]