21209704

素因数分解:

$2^3\times {\mathrm{31}}^1\times {\mathrm{85523}}^1$

素因数の和:85560

約数の個数: 16

約数和(自身を含む): 41051520

約数和(自身を除く): 19841816

約数列:

[1, 2, 4, 8, 31, 62, 124, 248, 85523, 171046, 342092, 684184, 2651213, 5302426, 10604852, 21209704]

約数ペア:

[(1, 21209704), (2, 10604852), (4, 5302426), (8, 2651213), (31, 684184), (62, 342092), (124, 171046), (248, 85523)]