198640

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{191}}^1$

素因数の和:217

約数の個数: 40

約数和(自身を含む): 499968

約数和(自身を除く): 301328

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 191, 208, 260, 382, 520, 764, 955, 1040, 1528, 1910, 2483, 3056, 3820, 4966, 7640, 9932, 12415, 15280, 19864, 24830, 39728, 49660, 99320, 198640]

約数ペア:

[(1, 198640), (2, 99320), (4, 49660), (5, 39728), (8, 24830), (10, 19864), (13, 15280), (16, 12415), (20, 9932), (26, 7640), (40, 4966), (52, 3820), (65, 3056), (80, 2483), (104, 1910), (130, 1528), (191, 1040), (208, 955), (260, 764), (382, 520)]