21745840

素因数分解:

$2^4\times 5^1\times {\mathrm{229}}^1\times {\mathrm{1187}}^1$

素因数の和:1429

約数の個数: 40

約数和(自身を含む): 50822640

約数和(自身を除く): 29076800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 229, 458, 916, 1145, 1187, 1832, 2290, 2374, 3664, 4580, 4748, 5935, 9160, 9496, 11870, 18320, 18992, 23740, 47480, 94960, 271823, 543646, 1087292, 1359115, 2174584, 2718230, 4349168, 5436460, 10872920, 21745840]

約数ペア:

[(1, 21745840), (2, 10872920), (4, 5436460), (5, 4349168), (8, 2718230), (10, 2174584), (16, 1359115), (20, 1087292), (40, 543646), (80, 271823), (229, 94960), (458, 47480), (916, 23740), (1145, 18992), (1187, 18320), (1832, 11870), (2290, 9496), (2374, 9160), (3664, 5935), (4580, 4748)]