20824180

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{61}}^1\times {\mathrm{101}}^1$

素因数の和:197

約数の個数: 72

約数和(自身を含む): 48606264

約数和(自身を除く): 27782084

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 61, 65, 101, 122, 130, 169, 202, 244, 260, 305, 338, 404, 505, 610, 676, 793, 845, 1010, 1220, 1313, 1586, 1690, 2020, 2626, 3172, 3380, 3965, 5252, 6161, 6565, 7930, 10309, 12322, 13130, 15860, 17069, 20618, 24644, 26260, 30805, 34138, 41236, 51545, 61610, 68276, 80093, 85345, 103090, 123220, 160186, 170690, 206180, 320372, 341380, 400465, 800930, 1041209, 1601860, 2082418, 4164836, 5206045, 10412090, 20824180]

約数ペア:

[(1, 20824180), (2, 10412090), (4, 5206045), (5, 4164836), (10, 2082418), (13, 1601860), (20, 1041209), (26, 800930), (52, 400465), (61, 341380), (65, 320372), (101, 206180), (122, 170690), (130, 160186), (169, 123220), (202, 103090), (244, 85345), (260, 80093), (305, 68276), (338, 61610), (404, 51545), (505, 41236), (610, 34138), (676, 30805), (793, 26260), (845, 24644), (1010, 20618), (1220, 17069), (1313, 15860), (1586, 13130), (1690, 12322), (2020, 10309), (2626, 7930), (3172, 6565), (3380, 6161), (3965, 5252)]