9991280

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^2\times {\mathrm{739}}^1$

素因数の和:778

約数の個数: 60

約数和(自身を含む): 25188120

約数和(自身を除く): 15196840

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 169, 208, 260, 338, 520, 676, 739, 845, 1040, 1352, 1478, 1690, 2704, 2956, 3380, 3695, 5912, 6760, 7390, 9607, 11824, 13520, 14780, 19214, 29560, 38428, 48035, 59120, 76856, 96070, 124891, 153712, 192140, 249782, 384280, 499564, 624455, 768560, 999128, 1248910, 1998256, 2497820, 4995640, 9991280]

約数ペア:

[(1, 9991280), (2, 4995640), (4, 2497820), (5, 1998256), (8, 1248910), (10, 999128), (13, 768560), (16, 624455), (20, 499564), (26, 384280), (40, 249782), (52, 192140), (65, 153712), (80, 124891), (104, 96070), (130, 76856), (169, 59120), (208, 48035), (260, 38428), (338, 29560), (520, 19214), (676, 14780), (739, 13520), (845, 11824), (1040, 9607), (1352, 7390), (1478, 6760), (1690, 5912), (2704, 3695), (2956, 3380)]