21400805

素因数分解:

$5^1\times {\mathrm{67}}^1\times {\mathrm{193}}^1\times {\mathrm{331}}^1$

素因数の和:596

約数の個数: 16

約数和(自身を含む): 26278464

約数和(自身を除く): 4877659

約数列:

[1, 5, 67, 193, 331, 335, 965, 1655, 12931, 22177, 63883, 64655, 110885, 319415, 4280161, 21400805]

約数ペア:

[(1, 21400805), (5, 4280161), (67, 319415), (193, 110885), (331, 64655), (335, 63883), (965, 22177), (1655, 12931)]