20988315

素因数分解:

$3^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{1787}}^1$

素因数の和:1833

約数の個数: 40

約数和(自身を含む): 38942640

約数和(自身を除く): 17954325

約数列:

[1, 3, 5, 9, 15, 27, 29, 45, 81, 87, 135, 145, 261, 405, 435, 783, 1305, 1787, 2349, 3915, 5361, 8935, 11745, 16083, 26805, 48249, 51823, 80415, 144747, 155469, 241245, 259115, 466407, 723735, 777345, 1399221, 2332035, 4197663, 6996105, 20988315]

約数ペア:

[(1, 20988315), (3, 6996105), (5, 4197663), (9, 2332035), (15, 1399221), (27, 777345), (29, 723735), (45, 466407), (81, 259115), (87, 241245), (135, 155469), (145, 144747), (261, 80415), (405, 51823), (435, 48249), (783, 26805), (1305, 16083), (1787, 11745), (2349, 8935), (3915, 5361)]