21826760

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{13309}}^1$

素因数の和:13361

約数の個数: 32

約数和(自身を含む): 50311800

約数和(自身を除く): 28485040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 13309, 26618, 53236, 66545, 106472, 133090, 266180, 532360, 545669, 1091338, 2182676, 2728345, 4365352, 5456690, 10913380, 21826760]

約数ペア:

[(1, 21826760), (2, 10913380), (4, 5456690), (5, 4365352), (8, 2728345), (10, 2182676), (20, 1091338), (40, 545669), (41, 532360), (82, 266180), (164, 133090), (205, 106472), (328, 66545), (410, 53236), (820, 26618), (1640, 13309)]