20751520

素因数分解:

$2^5\times 5^1\times {\mathrm{23}}^1\times {\mathrm{5639}}^1$

素因数の和:5677

約数の個数: 48

約数和(自身を含む): 51166080

約数和(自身を除く): 30414560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 32, 40, 46, 80, 92, 115, 160, 184, 230, 368, 460, 736, 920, 1840, 3680, 5639, 11278, 22556, 28195, 45112, 56390, 90224, 112780, 129697, 180448, 225560, 259394, 451120, 518788, 648485, 902240, 1037576, 1296970, 2075152, 2593940, 4150304, 5187880, 10375760, 20751520]

約数ペア:

[(1, 20751520), (2, 10375760), (4, 5187880), (5, 4150304), (8, 2593940), (10, 2075152), (16, 1296970), (20, 1037576), (23, 902240), (32, 648485), (40, 518788), (46, 451120), (80, 259394), (92, 225560), (115, 180448), (160, 129697), (184, 112780), (230, 90224), (368, 56390), (460, 45112), (736, 28195), (920, 22556), (1840, 11278), (3680, 5639)]