21787984

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{71671}}^1$

素因数の和:71698

約数の個数: 20

約数和(自身を含む): 44436640

約数和(自身を除く): 22648656

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 71671, 143342, 286684, 573368, 1146736, 1361749, 2723498, 5446996, 10893992, 21787984]

約数ペア:

[(1, 21787984), (2, 10893992), (4, 5446996), (8, 2723498), (16, 1361749), (19, 1146736), (38, 573368), (76, 286684), (152, 143342), (304, 71671)]