20917808

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{181}}^1\times {\mathrm{233}}^1$

素因数の和:453

約数の個数: 40

約数和(自身を含む): 42247296

約数和(自身を除く): 21329488

約数列:

[1, 2, 4, 8, 16, 31, 62, 124, 181, 233, 248, 362, 466, 496, 724, 932, 1448, 1864, 2896, 3728, 5611, 7223, 11222, 14446, 22444, 28892, 42173, 44888, 57784, 84346, 89776, 115568, 168692, 337384, 674768, 1307363, 2614726, 5229452, 10458904, 20917808]

約数ペア:

[(1, 20917808), (2, 10458904), (4, 5229452), (8, 2614726), (16, 1307363), (31, 674768), (62, 337384), (124, 168692), (181, 115568), (233, 89776), (248, 84346), (362, 57784), (466, 44888), (496, 42173), (724, 28892), (932, 22444), (1448, 14446), (1864, 11222), (2896, 7223), (3728, 5611)]