20902180

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{4729}}^1$

素因数の和:4768

約数の個数: 48

約数和(自身を含む): 50062320

約数和(自身を除く): 29160140

約数列:

[1, 2, 4, 5, 10, 13, 17, 20, 26, 34, 52, 65, 68, 85, 130, 170, 221, 260, 340, 442, 884, 1105, 2210, 4420, 4729, 9458, 18916, 23645, 47290, 61477, 80393, 94580, 122954, 160786, 245908, 307385, 321572, 401965, 614770, 803930, 1045109, 1229540, 1607860, 2090218, 4180436, 5225545, 10451090, 20902180]

約数ペア:

[(1, 20902180), (2, 10451090), (4, 5225545), (5, 4180436), (10, 2090218), (13, 1607860), (17, 1229540), (20, 1045109), (26, 803930), (34, 614770), (52, 401965), (65, 321572), (68, 307385), (85, 245908), (130, 160786), (170, 122954), (221, 94580), (260, 80393), (340, 61477), (442, 47290), (884, 23645), (1105, 18916), (2210, 9458), (4420, 4729)]