20968155

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{73}}^1\times {\mathrm{491}}^1$

素因数の和:588

約数の個数: 48

約数和(自身を含む): 39757536

約数和(自身を除く): 18789381

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 73, 117, 195, 219, 365, 491, 585, 657, 949, 1095, 1473, 2455, 2847, 3285, 4419, 4745, 6383, 7365, 8541, 14235, 19149, 22095, 31915, 35843, 42705, 57447, 95745, 107529, 179215, 287235, 322587, 465959, 537645, 1397877, 1612935, 2329795, 4193631, 6989385, 20968155]

約数ペア:

[(1, 20968155), (3, 6989385), (5, 4193631), (9, 2329795), (13, 1612935), (15, 1397877), (39, 537645), (45, 465959), (65, 322587), (73, 287235), (117, 179215), (195, 107529), (219, 95745), (365, 57447), (491, 42705), (585, 35843), (657, 31915), (949, 22095), (1095, 19149), (1473, 14235), (2455, 8541), (2847, 7365), (3285, 6383), (4419, 4745)]