20640928

素因数分解:

$2^5\times 7^1\times {\mathrm{11}}^1\times {\mathrm{8377}}^1$

素因数の和:8405

約数の個数: 48

約数和(自身を含む): 50670144

約数和(自身を除く): 30029216

約数列:

[1, 2, 4, 7, 8, 11, 14, 16, 22, 28, 32, 44, 56, 77, 88, 112, 154, 176, 224, 308, 352, 616, 1232, 2464, 8377, 16754, 33508, 58639, 67016, 92147, 117278, 134032, 184294, 234556, 268064, 368588, 469112, 645029, 737176, 938224, 1290058, 1474352, 1876448, 2580116, 2948704, 5160232, 10320464, 20640928]

約数ペア:

[(1, 20640928), (2, 10320464), (4, 5160232), (7, 2948704), (8, 2580116), (11, 1876448), (14, 1474352), (16, 1290058), (22, 938224), (28, 737176), (32, 645029), (44, 469112), (56, 368588), (77, 268064), (88, 234556), (112, 184294), (154, 134032), (176, 117278), (224, 92147), (308, 67016), (352, 58639), (616, 33508), (1232, 16754), (2464, 8377)]