20718284

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{109}}^1$

素因数の和:234

約数の個数: 48

約数和(自身を含む): 40101600

約数和(自身を除く): 19383316

約数列:

[1, 2, 4, 19, 38, 41, 61, 76, 82, 109, 122, 164, 218, 244, 436, 779, 1159, 1558, 2071, 2318, 2501, 3116, 4142, 4469, 4636, 5002, 6649, 8284, 8938, 10004, 13298, 17876, 26596, 47519, 84911, 95038, 126331, 169822, 190076, 252662, 272609, 339644, 505324, 545218, 1090436, 5179571, 10359142, 20718284]

約数ペア:

[(1, 20718284), (2, 10359142), (4, 5179571), (19, 1090436), (38, 545218), (41, 505324), (61, 339644), (76, 272609), (82, 252662), (109, 190076), (122, 169822), (164, 126331), (218, 95038), (244, 84911), (436, 47519), (779, 26596), (1159, 17876), (1558, 13298), (2071, 10004), (2318, 8938), (2501, 8284), (3116, 6649), (4142, 5002), (4469, 4636)]