21080612

素因数分解:

$2^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{661}}^1$

素因数の和:756

約数の個数: 48

約数和(自身を含む): 45376128

約数和(自身を除く): 24295516

約数列:

[1, 2, 4, 7, 14, 17, 28, 34, 67, 68, 119, 134, 238, 268, 469, 476, 661, 938, 1139, 1322, 1876, 2278, 2644, 4556, 4627, 7973, 9254, 11237, 15946, 18508, 22474, 31892, 44287, 44948, 78659, 88574, 157318, 177148, 310009, 314636, 620018, 752879, 1240036, 1505758, 3011516, 5270153, 10540306, 21080612]

約数ペア:

[(1, 21080612), (2, 10540306), (4, 5270153), (7, 3011516), (14, 1505758), (17, 1240036), (28, 752879), (34, 620018), (67, 314636), (68, 310009), (119, 177148), (134, 157318), (238, 88574), (268, 78659), (469, 44948), (476, 44287), (661, 31892), (938, 22474), (1139, 18508), (1322, 15946), (1876, 11237), (2278, 9254), (2644, 7973), (4556, 4627)]