21173440

素因数分解:

$2^6\times 5^1\times {\mathrm{127}}^1\times {\mathrm{521}}^1$

素因数の和:665

約数の個数: 56

約数和(自身を含む): 50913792

約数和(自身を除く): 29740352

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 127, 160, 254, 320, 508, 521, 635, 1016, 1042, 1270, 2032, 2084, 2540, 2605, 4064, 4168, 5080, 5210, 8128, 8336, 10160, 10420, 16672, 20320, 20840, 33344, 40640, 41680, 66167, 83360, 132334, 166720, 264668, 330835, 529336, 661670, 1058672, 1323340, 2117344, 2646680, 4234688, 5293360, 10586720, 21173440]

約数ペア:

[(1, 21173440), (2, 10586720), (4, 5293360), (5, 4234688), (8, 2646680), (10, 2117344), (16, 1323340), (20, 1058672), (32, 661670), (40, 529336), (64, 330835), (80, 264668), (127, 166720), (160, 132334), (254, 83360), (320, 66167), (508, 41680), (521, 40640), (635, 33344), (1016, 20840), (1042, 20320), (1270, 16672), (2032, 10420), (2084, 10160), (2540, 8336), (2605, 8128), (4064, 5210), (4168, 5080)]