21172856

素因数分解:

$2^3\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{1009}}^1$

素因数の和:1119

約数の個数: 32

約数和(自身を含む): 41329200

約数和(自身を除く): 20156344

約数列:

[1, 2, 4, 8, 43, 61, 86, 122, 172, 244, 344, 488, 1009, 2018, 2623, 4036, 5246, 8072, 10492, 20984, 43387, 61549, 86774, 123098, 173548, 246196, 347096, 492392, 2646607, 5293214, 10586428, 21172856]

約数ペア:

[(1, 21172856), (2, 10586428), (4, 5293214), (8, 2646607), (43, 492392), (61, 347096), (86, 246196), (122, 173548), (172, 123098), (244, 86774), (344, 61549), (488, 43387), (1009, 20984), (2018, 10492), (2623, 8072), (4036, 5246)]