21898280

素因数分解:

$2^3\times 5^1\times {\mathrm{67}}^1\times {\mathrm{8171}}^1$

素因数の和:8249

約数の個数: 32

約数和(自身を含む): 50012640

約数和(自身を除く): 28114360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 67, 134, 268, 335, 536, 670, 1340, 2680, 8171, 16342, 32684, 40855, 65368, 81710, 163420, 326840, 547457, 1094914, 2189828, 2737285, 4379656, 5474570, 10949140, 21898280]

約数ペア:

[(1, 21898280), (2, 10949140), (4, 5474570), (5, 4379656), (8, 2737285), (10, 2189828), (20, 1094914), (40, 547457), (67, 326840), (134, 163420), (268, 81710), (335, 65368), (536, 40855), (670, 32684), (1340, 16342), (2680, 8171)]