21692560

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{8747}}^1$

素因数の和:8791

約数の個数: 40

約数和(自身を含む): 52068096

約数和(自身を除く): 30375536

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 248, 310, 496, 620, 1240, 2480, 8747, 17494, 34988, 43735, 69976, 87470, 139952, 174940, 271157, 349880, 542314, 699760, 1084628, 1355785, 2169256, 2711570, 4338512, 5423140, 10846280, 21692560]

約数ペア:

[(1, 21692560), (2, 10846280), (4, 5423140), (5, 4338512), (8, 2711570), (10, 2169256), (16, 1355785), (20, 1084628), (31, 699760), (40, 542314), (62, 349880), (80, 271157), (124, 174940), (155, 139952), (248, 87470), (310, 69976), (496, 43735), (620, 34988), (1240, 17494), (2480, 8747)]