20875984

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{1597}}^1$

素因数の和:1667

約数の個数: 40

約数和(自身を含む): 43593440

約数和(自身を除く): 22717456

約数列:

[1, 2, 4, 8, 16, 19, 38, 43, 76, 86, 152, 172, 304, 344, 688, 817, 1597, 1634, 3194, 3268, 6388, 6536, 12776, 13072, 25552, 30343, 60686, 68671, 121372, 137342, 242744, 274684, 485488, 549368, 1098736, 1304749, 2609498, 5218996, 10437992, 20875984]

約数ペア:

[(1, 20875984), (2, 10437992), (4, 5218996), (8, 2609498), (16, 1304749), (19, 1098736), (38, 549368), (43, 485488), (76, 274684), (86, 242744), (152, 137342), (172, 121372), (304, 68671), (344, 60686), (688, 30343), (817, 25552), (1597, 13072), (1634, 12776), (3194, 6536), (3268, 6388)]