21679905

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{1523}}^1$

素因数の和:1617

約数の個数: 32

約数和(自身を含む): 37892736

約数和(自身を除く): 16212831

約数列:

[1, 3, 5, 13, 15, 39, 65, 73, 195, 219, 365, 949, 1095, 1523, 2847, 4569, 4745, 7615, 14235, 19799, 22845, 59397, 98995, 111179, 296985, 333537, 555895, 1445327, 1667685, 4335981, 7226635, 21679905]

約数ペア:

[(1, 21679905), (3, 7226635), (5, 4335981), (13, 1667685), (15, 1445327), (39, 555895), (65, 333537), (73, 296985), (195, 111179), (219, 98995), (365, 59397), (949, 22845), (1095, 19799), (1523, 14235), (2847, 7615), (4569, 4745)]