18970120

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{191}}^2$

素因数の和:406

約数の個数: 48

約数和(自身を含む): 46207980

約数和(自身を除く): 27237860

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 191, 260, 382, 520, 764, 955, 1528, 1910, 2483, 3820, 4966, 7640, 9932, 12415, 19864, 24830, 36481, 49660, 72962, 99320, 145924, 182405, 291848, 364810, 474253, 729620, 948506, 1459240, 1897012, 2371265, 3794024, 4742530, 9485060, 18970120]

約数ペア:

[(1, 18970120), (2, 9485060), (4, 4742530), (5, 3794024), (8, 2371265), (10, 1897012), (13, 1459240), (20, 948506), (26, 729620), (40, 474253), (52, 364810), (65, 291848), (104, 182405), (130, 145924), (191, 99320), (260, 72962), (382, 49660), (520, 36481), (764, 24830), (955, 19864), (1528, 12415), (1910, 9932), (2483, 7640), (3820, 4966)]