20819535

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{229}}^1$

素因数の和:296

約数の個数: 64

約数和(自身を含む): 39744000

約数和(自身を除く): 18924465

約数列:

[1, 3, 5, 11, 15, 19, 29, 33, 55, 57, 87, 95, 145, 165, 209, 229, 285, 319, 435, 551, 627, 687, 957, 1045, 1145, 1595, 1653, 2519, 2755, 3135, 3435, 4351, 4785, 6061, 6641, 7557, 8265, 12595, 13053, 18183, 19923, 21755, 30305, 33205, 37785, 47861, 65265, 73051, 90915, 99615, 126179, 143583, 219153, 239305, 365255, 378537, 630895, 717915, 1095765, 1387969, 1892685, 4163907, 6939845, 20819535]

約数ペア:

[(1, 20819535), (3, 6939845), (5, 4163907), (11, 1892685), (15, 1387969), (19, 1095765), (29, 717915), (33, 630895), (55, 378537), (57, 365255), (87, 239305), (95, 219153), (145, 143583), (165, 126179), (209, 99615), (229, 90915), (285, 73051), (319, 65265), (435, 47861), (551, 37785), (627, 33205), (687, 30305), (957, 21755), (1045, 19923), (1145, 18183), (1595, 13053), (1653, 12595), (2519, 8265), (2755, 7557), (3135, 6641), (3435, 6061), (4351, 4785)]