20528180

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{173}}^1\times {\mathrm{349}}^1$

素因数の和:548

約数の個数: 48

約数和(自身を含む): 46040400

約数和(自身を除く): 25512220

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 173, 340, 346, 349, 692, 698, 865, 1396, 1730, 1745, 2941, 3460, 3490, 5882, 5933, 6980, 11764, 11866, 14705, 23732, 29410, 29665, 58820, 59330, 60377, 118660, 120754, 241508, 301885, 603770, 1026409, 1207540, 2052818, 4105636, 5132045, 10264090, 20528180]

約数ペア:

[(1, 20528180), (2, 10264090), (4, 5132045), (5, 4105636), (10, 2052818), (17, 1207540), (20, 1026409), (34, 603770), (68, 301885), (85, 241508), (170, 120754), (173, 118660), (340, 60377), (346, 59330), (349, 58820), (692, 29665), (698, 29410), (865, 23732), (1396, 14705), (1730, 11866), (1745, 11764), (2941, 6980), (3460, 5933), (3490, 5882)]