20733700

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{389}}^1$

素因数の和:457

約数の個数: 72

約数和(自身を含む): 49762440

約数和(自身を除く): 29028740

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 41, 50, 52, 65, 82, 100, 130, 164, 205, 260, 325, 389, 410, 533, 650, 778, 820, 1025, 1066, 1300, 1556, 1945, 2050, 2132, 2665, 3890, 4100, 5057, 5330, 7780, 9725, 10114, 10660, 13325, 15949, 19450, 20228, 25285, 26650, 31898, 38900, 50570, 53300, 63796, 79745, 101140, 126425, 159490, 207337, 252850, 318980, 398725, 414674, 505700, 797450, 829348, 1036685, 1594900, 2073370, 4146740, 5183425, 10366850, 20733700]

約数ペア:

[(1, 20733700), (2, 10366850), (4, 5183425), (5, 4146740), (10, 2073370), (13, 1594900), (20, 1036685), (25, 829348), (26, 797450), (41, 505700), (50, 414674), (52, 398725), (65, 318980), (82, 252850), (100, 207337), (130, 159490), (164, 126425), (205, 101140), (260, 79745), (325, 63796), (389, 53300), (410, 50570), (533, 38900), (650, 31898), (778, 26650), (820, 25285), (1025, 20228), (1066, 19450), (1300, 15949), (1556, 13325), (1945, 10660), (2050, 10114), (2132, 9725), (2665, 7780), (3890, 5330), (4100, 5057)]