20420816

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{3167}}^1$

素因数の和:3219

約数の個数: 40

約数和(自身を含む): 43997184

約数和(自身を除く): 23576368

約数列:

[1, 2, 4, 8, 13, 16, 26, 31, 52, 62, 104, 124, 208, 248, 403, 496, 806, 1612, 3167, 3224, 6334, 6448, 12668, 25336, 41171, 50672, 82342, 98177, 164684, 196354, 329368, 392708, 658736, 785416, 1276301, 1570832, 2552602, 5105204, 10210408, 20420816]

約数ペア:

[(1, 20420816), (2, 10210408), (4, 5105204), (8, 2552602), (13, 1570832), (16, 1276301), (26, 785416), (31, 658736), (52, 392708), (62, 329368), (104, 196354), (124, 164684), (208, 98177), (248, 82342), (403, 50672), (496, 41171), (806, 25336), (1612, 12668), (3167, 6448), (3224, 6334)]