128920040

素因数分解:

$2^3\times 5^1\times {\mathrm{733}}^1\times {\mathrm{4397}}^1$

素因数の和:5141

約数の個数: 32

約数和(自身を含む): 290531880

約数和(自身を除く): 161611840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 733, 1466, 2932, 3665, 4397, 5864, 7330, 8794, 14660, 17588, 21985, 29320, 35176, 43970, 87940, 175880, 3223001, 6446002, 12892004, 16115005, 25784008, 32230010, 64460020, 128920040]

約数ペア:

[(1, 128920040), (2, 64460020), (4, 32230010), (5, 25784008), (8, 16115005), (10, 12892004), (20, 6446002), (40, 3223001), (733, 175880), (1466, 87940), (2932, 43970), (3665, 35176), (4397, 29320), (5864, 21985), (7330, 17588), (8794, 14660)]