1640253880

素因数分解:

$2^3\times 5^1\times {\mathrm{521}}^1\times {\mathrm{78707}}^1$

素因数の和:79239

約数の個数: 32

約数和(自身を含む): 3697701840

約数和(自身を除く): 2057447960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 521, 1042, 2084, 2605, 4168, 5210, 10420, 20840, 78707, 157414, 314828, 393535, 629656, 787070, 1574140, 3148280, 41006347, 82012694, 164025388, 205031735, 328050776, 410063470, 820126940, 1640253880]

約数ペア:

[(1, 1640253880), (2, 820126940), (4, 410063470), (5, 328050776), (8, 205031735), (10, 164025388), (20, 82012694), (40, 41006347), (521, 3148280), (1042, 1574140), (2084, 787070), (2605, 629656), (4168, 393535), (5210, 314828), (10420, 157414), (20840, 78707)]