21911813

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{383}}^1\times {\mathrm{743}}^1$

素因数の和:1144

約数の個数: 16

約数和(自身を含む): 27426816

約数和(自身を除く): 5515003

約数列:

[1, 7, 11, 77, 383, 743, 2681, 4213, 5201, 8173, 29491, 57211, 284569, 1991983, 3130259, 21911813]

約数ペア:

[(1, 21911813), (7, 3130259), (11, 1991983), (77, 284569), (383, 57211), (743, 29491), (2681, 8173), (4213, 5201)]