21765705

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^2\times {\mathrm{211}}^1$

素因数の和:278

約数の個数: 48

約数和(自身を含む): 39391296

約数和(自身を除く): 17625591

約数列:

[1, 3, 5, 13, 15, 23, 39, 65, 69, 115, 195, 211, 299, 345, 529, 633, 897, 1055, 1495, 1587, 2645, 2743, 3165, 4485, 4853, 6877, 7935, 8229, 13715, 14559, 20631, 24265, 34385, 41145, 63089, 72795, 103155, 111619, 189267, 315445, 334857, 558095, 946335, 1451047, 1674285, 4353141, 7255235, 21765705]

約数ペア:

[(1, 21765705), (3, 7255235), (5, 4353141), (13, 1674285), (15, 1451047), (23, 946335), (39, 558095), (65, 334857), (69, 315445), (115, 189267), (195, 111619), (211, 103155), (299, 72795), (345, 63089), (529, 41145), (633, 34385), (897, 24265), (1055, 20631), (1495, 14559), (1587, 13715), (2645, 8229), (2743, 7935), (3165, 6877), (4485, 4853)]