21905985

素因数分解:

$3^1\times 5^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1\times {\mathrm{307}}^1$

素因数の和:453

約数の個数: 32

約数和(自身を含む): 36191232

約数和(自身を除く): 14285247

約数列:

[1, 3, 5, 15, 67, 71, 201, 213, 307, 335, 355, 921, 1005, 1065, 1535, 4605, 4757, 14271, 20569, 21797, 23785, 61707, 65391, 71355, 102845, 108985, 308535, 326955, 1460399, 4381197, 7301995, 21905985]

約数ペア:

[(1, 21905985), (3, 7301995), (5, 4381197), (15, 1460399), (67, 326955), (71, 308535), (201, 108985), (213, 102845), (307, 71355), (335, 65391), (355, 61707), (921, 23785), (1005, 21797), (1065, 20569), (1535, 14271), (4605, 4757)]