28135640

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{887}}^1$

素因数の和:972

約数の個数: 64

約数和(自身を含む): 69370560

約数和(自身を除く): 41234920

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 61, 65, 104, 122, 130, 244, 260, 305, 488, 520, 610, 793, 887, 1220, 1586, 1774, 2440, 3172, 3548, 3965, 4435, 6344, 7096, 7930, 8870, 11531, 15860, 17740, 23062, 31720, 35480, 46124, 54107, 57655, 92248, 108214, 115310, 216428, 230620, 270535, 432856, 461240, 541070, 703391, 1082140, 1406782, 2164280, 2813564, 3516955, 5627128, 7033910, 14067820, 28135640]

約数ペア:

[(1, 28135640), (2, 14067820), (4, 7033910), (5, 5627128), (8, 3516955), (10, 2813564), (13, 2164280), (20, 1406782), (26, 1082140), (40, 703391), (52, 541070), (61, 461240), (65, 432856), (104, 270535), (122, 230620), (130, 216428), (244, 115310), (260, 108214), (305, 92248), (488, 57655), (520, 54107), (610, 46124), (793, 35480), (887, 31720), (1220, 23062), (1586, 17740), (1774, 15860), (2440, 11531), (3172, 8870), (3548, 7930), (3965, 7096), (4435, 6344)]