81480440

素因数分解:

$2^3\times 5^1\times {\mathrm{163}}^1\times {\mathrm{12497}}^1$

素因数の和:12671

約数の個数: 32

約数和(自身を含む): 184470480

約数和(自身を除く): 102990040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 163, 326, 652, 815, 1304, 1630, 3260, 6520, 12497, 24994, 49988, 62485, 99976, 124970, 249940, 499880, 2037011, 4074022, 8148044, 10185055, 16296088, 20370110, 40740220, 81480440]

約数ペア:

[(1, 81480440), (2, 40740220), (4, 20370110), (5, 16296088), (8, 10185055), (10, 8148044), (20, 4074022), (40, 2037011), (163, 499880), (326, 249940), (652, 124970), (815, 99976), (1304, 62485), (1630, 49988), (3260, 24994), (6520, 12497)]