20123740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{11057}}^1$

素因数の和:11086

約数の個数: 48

約数和(自身を含む): 52016832

約数和(自身を除く): 31893092

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 1820, 11057, 22114, 44228, 55285, 77399, 110570, 143741, 154798, 221140, 287482, 309596, 386995, 574964, 718705, 773990, 1006187, 1437410, 1547980, 2012374, 2874820, 4024748, 5030935, 10061870, 20123740]

約数ペア:

[(1, 20123740), (2, 10061870), (4, 5030935), (5, 4024748), (7, 2874820), (10, 2012374), (13, 1547980), (14, 1437410), (20, 1006187), (26, 773990), (28, 718705), (35, 574964), (52, 386995), (65, 309596), (70, 287482), (91, 221140), (130, 154798), (140, 143741), (182, 110570), (260, 77399), (364, 55285), (455, 44228), (910, 22114), (1820, 11057)]