21398864

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{1637}}^1$

素因数の和:1707

約数の個数: 40

約数和(自身を含む): 44684640

約数和(自身を除く): 23285776

約数列:

[1, 2, 4, 8, 16, 19, 38, 43, 76, 86, 152, 172, 304, 344, 688, 817, 1634, 1637, 3268, 3274, 6536, 6548, 13072, 13096, 26192, 31103, 62206, 70391, 124412, 140782, 248824, 281564, 497648, 563128, 1126256, 1337429, 2674858, 5349716, 10699432, 21398864]

約数ペア:

[(1, 21398864), (2, 10699432), (4, 5349716), (8, 2674858), (16, 1337429), (19, 1126256), (38, 563128), (43, 497648), (76, 281564), (86, 248824), (152, 140782), (172, 124412), (304, 70391), (344, 62206), (688, 31103), (817, 26192), (1634, 13096), (1637, 13072), (3268, 6548), (3274, 6536)]