21286615

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{853}}^1$

素因数の和:919

約数の個数: 32

約数和(自身を含む): 31481856

約数和(自身を除く): 10195241

約数列:

[1, 5, 7, 23, 31, 35, 115, 155, 161, 217, 713, 805, 853, 1085, 3565, 4265, 4991, 5971, 19619, 24955, 26443, 29855, 98095, 132215, 137333, 185101, 608189, 686665, 925505, 3040945, 4257323, 21286615]

約数ペア:

[(1, 21286615), (5, 4257323), (7, 3040945), (23, 925505), (31, 686665), (35, 608189), (115, 185101), (155, 137333), (161, 132215), (217, 98095), (713, 29855), (805, 26443), (853, 24955), (1085, 19619), (3565, 5971), (4265, 4991)]