20983520

素因数分解:

$2^5\times 5^1\times {\mathrm{313}}^1\times {\mathrm{419}}^1$

素因数の和:747

約数の個数: 48

約数和(自身を含む): 49850640

約数和(自身を除く): 28867120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 313, 419, 626, 838, 1252, 1565, 1676, 2095, 2504, 3130, 3352, 4190, 5008, 6260, 6704, 8380, 10016, 12520, 13408, 16760, 25040, 33520, 50080, 67040, 131147, 262294, 524588, 655735, 1049176, 1311470, 2098352, 2622940, 4196704, 5245880, 10491760, 20983520]

約数ペア:

[(1, 20983520), (2, 10491760), (4, 5245880), (5, 4196704), (8, 2622940), (10, 2098352), (16, 1311470), (20, 1049176), (32, 655735), (40, 524588), (80, 262294), (160, 131147), (313, 67040), (419, 50080), (626, 33520), (838, 25040), (1252, 16760), (1565, 13408), (1676, 12520), (2095, 10016), (2504, 8380), (3130, 6704), (3352, 6260), (4190, 5008)]