640870438

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{577}}^1\times {\mathrm{42719}}^1$

素因数の和:43311

約数の個数: 16

約数和(自身を含む): 1037070720

約数和(自身を除く): 396200282

約数列:

[1, 2, 13, 26, 577, 1154, 7501, 15002, 42719, 85438, 555347, 1110694, 24648863, 49297726, 320435219, 640870438]

約数ペア:

[(1, 640870438), (2, 320435219), (13, 49297726), (26, 24648863), (577, 1110694), (1154, 555347), (7501, 85438), (15002, 42719)]