128121968

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{615971}}^1$

素因数の和:615992

約数の個数: 20

約数和(自身を含む): 267331848

約数和(自身を除く): 139209880

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 615971, 1231942, 2463884, 4927768, 8007623, 9855536, 16015246, 32030492, 64060984, 128121968]

約数ペア:

[(1, 128121968), (2, 64060984), (4, 32030492), (8, 16015246), (13, 9855536), (16, 8007623), (26, 4927768), (52, 2463884), (104, 1231942), (208, 615971)]