21515979

素因数分解:

$3^1\times {\mathrm{103}}^1\times {\mathrm{179}}^1\times {\mathrm{389}}^1$

素因数の和:674

約数の個数: 16

約数和(自身を含む): 29203200

約数和(自身を除く): 7687221

約数列:

[1, 3, 103, 179, 309, 389, 537, 1167, 18437, 40067, 55311, 69631, 120201, 208893, 7171993, 21515979]

約数ペア:

[(1, 21515979), (3, 7171993), (103, 208893), (179, 120201), (309, 69631), (389, 55311), (537, 40067), (1167, 18437)]