20619820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{1117}}^1$

素因数の和:1210

約数の個数: 48

約数和(自身を含む): 47331648

約数和(自身を除く): 26711828

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 71, 130, 142, 260, 284, 355, 710, 923, 1117, 1420, 1846, 2234, 3692, 4468, 4615, 5585, 9230, 11170, 14521, 18460, 22340, 29042, 58084, 72605, 79307, 145210, 158614, 290420, 317228, 396535, 793070, 1030991, 1586140, 2061982, 4123964, 5154955, 10309910, 20619820]

約数ペア:

[(1, 20619820), (2, 10309910), (4, 5154955), (5, 4123964), (10, 2061982), (13, 1586140), (20, 1030991), (26, 793070), (52, 396535), (65, 317228), (71, 290420), (130, 158614), (142, 145210), (260, 79307), (284, 72605), (355, 58084), (710, 29042), (923, 22340), (1117, 18460), (1420, 14521), (1846, 11170), (2234, 9230), (3692, 5585), (4468, 4615)]