21490105

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{647}}^1$

素因数の和:745

約数の個数: 32

約数和(自身を含む): 32223744

約数和(自身を除く): 10733639

約数列:

[1, 5, 7, 13, 35, 65, 73, 91, 365, 455, 511, 647, 949, 2555, 3235, 4529, 4745, 6643, 8411, 22645, 33215, 42055, 47231, 58877, 236155, 294385, 330617, 614003, 1653085, 3070015, 4298021, 21490105]

約数ペア:

[(1, 21490105), (5, 4298021), (7, 3070015), (13, 1653085), (35, 614003), (65, 330617), (73, 294385), (91, 236155), (365, 58877), (455, 47231), (511, 42055), (647, 33215), (949, 22645), (2555, 8411), (3235, 6643), (4529, 4745)]