20904210

素因数分解:

$2^1\times 3^3\times 5^1\times {\mathrm{139}}^1\times {\mathrm{557}}^1$

素因数の和:712

約数の個数: 64

約数和(自身を含む): 56246400

約数和(自身を除く): 35342190

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 45, 54, 90, 135, 139, 270, 278, 417, 557, 695, 834, 1114, 1251, 1390, 1671, 2085, 2502, 2785, 3342, 3753, 4170, 5013, 5570, 6255, 7506, 8355, 10026, 12510, 15039, 16710, 18765, 25065, 30078, 37530, 50130, 75195, 77423, 150390, 154846, 232269, 387115, 464538, 696807, 774230, 1161345, 1393614, 2090421, 2322690, 3484035, 4180842, 6968070, 10452105, 20904210]

約数ペア:

[(1, 20904210), (2, 10452105), (3, 6968070), (5, 4180842), (6, 3484035), (9, 2322690), (10, 2090421), (15, 1393614), (18, 1161345), (27, 774230), (30, 696807), (45, 464538), (54, 387115), (90, 232269), (135, 154846), (139, 150390), (270, 77423), (278, 75195), (417, 50130), (557, 37530), (695, 30078), (834, 25065), (1114, 18765), (1251, 16710), (1390, 15039), (1671, 12510), (2085, 10026), (2502, 8355), (2785, 7506), (3342, 6255), (3753, 5570), (4170, 5013)]