87991780

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{55691}}^1$

素因数の和:55779

約数の個数: 24

約数和(自身を含む): 187125120

約数和(自身を除く): 99133340

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 55691, 111382, 222764, 278455, 556910, 1113820, 4399589, 8799178, 17598356, 21997945, 43995890, 87991780]

約数ペア:

[(1, 87991780), (2, 43995890), (4, 21997945), (5, 17598356), (10, 8799178), (20, 4399589), (79, 1113820), (158, 556910), (316, 278455), (395, 222764), (790, 111382), (1580, 55691)]