20268980

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{139}}^1\times {\mathrm{317}}^1$

素因数の和:488

約数の個数: 48

約数和(自身を含む): 44876160

約数和(自身を除く): 24607180

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 115, 139, 230, 278, 317, 460, 556, 634, 695, 1268, 1390, 1585, 2780, 3170, 3197, 6340, 6394, 7291, 12788, 14582, 15985, 29164, 31970, 36455, 44063, 63940, 72910, 88126, 145820, 176252, 220315, 440630, 881260, 1013449, 2026898, 4053796, 5067245, 10134490, 20268980]

約数ペア:

[(1, 20268980), (2, 10134490), (4, 5067245), (5, 4053796), (10, 2026898), (20, 1013449), (23, 881260), (46, 440630), (92, 220315), (115, 176252), (139, 145820), (230, 88126), (278, 72910), (317, 63940), (460, 44063), (556, 36455), (634, 31970), (695, 29164), (1268, 15985), (1390, 14582), (1585, 12788), (2780, 7291), (3170, 6394), (3197, 6340)]