21378628

素因数分解:

$2^2\times {\mathrm{67}}^1\times {\mathrm{241}}^1\times {\mathrm{331}}^1$

素因数の和:643

約数の個数: 24

約数和(自身を含む): 38243744

約数和(自身を除く): 16865116

約数列:

[1, 2, 4, 67, 134, 241, 268, 331, 482, 662, 964, 1324, 16147, 22177, 32294, 44354, 64588, 79771, 88708, 159542, 319084, 5344657, 10689314, 21378628]

約数ペア:

[(1, 21378628), (2, 10689314), (4, 5344657), (67, 319084), (134, 159542), (241, 88708), (268, 79771), (331, 64588), (482, 44354), (662, 32294), (964, 22177), (1324, 16147)]