12978160

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{12479}}^1$

素因数の和:12505

約数の個数: 40

約数和(自身を含む): 32497920

約数和(自身を除く): 19519760

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 12479, 24958, 49916, 62395, 99832, 124790, 162227, 199664, 249580, 324454, 499160, 648908, 811135, 998320, 1297816, 1622270, 2595632, 3244540, 6489080, 12978160]

約数ペア:

[(1, 12978160), (2, 6489080), (4, 3244540), (5, 2595632), (8, 1622270), (10, 1297816), (13, 998320), (16, 811135), (20, 648908), (26, 499160), (40, 324454), (52, 249580), (65, 199664), (80, 162227), (104, 124790), (130, 99832), (208, 62395), (260, 49916), (520, 24958), (1040, 12479)]