20855540

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{773}}^1$

素因数の和:872

約数の個数: 48

約数和(自身を含む): 46811520

約数和(自身を除く): 25955980

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 71, 76, 95, 142, 190, 284, 355, 380, 710, 773, 1349, 1420, 1546, 2698, 3092, 3865, 5396, 6745, 7730, 13490, 14687, 15460, 26980, 29374, 54883, 58748, 73435, 109766, 146870, 219532, 274415, 293740, 548830, 1042777, 1097660, 2085554, 4171108, 5213885, 10427770, 20855540]

約数ペア:

[(1, 20855540), (2, 10427770), (4, 5213885), (5, 4171108), (10, 2085554), (19, 1097660), (20, 1042777), (38, 548830), (71, 293740), (76, 274415), (95, 219532), (142, 146870), (190, 109766), (284, 73435), (355, 58748), (380, 54883), (710, 29374), (773, 26980), (1349, 15460), (1420, 14687), (1546, 13490), (2698, 7730), (3092, 6745), (3865, 5396)]