21710025

素因数分解:

$3^4\times 5^2\times {\mathrm{71}}^1\times {\mathrm{151}}^1$

素因数の和:244

約数の個数: 60

約数和(自身を含む): 41050944

約数和(自身を除く): 19340919

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 71, 75, 81, 135, 151, 213, 225, 355, 405, 453, 639, 675, 755, 1065, 1359, 1775, 1917, 2025, 2265, 3195, 3775, 4077, 5325, 5751, 6795, 9585, 10721, 11325, 12231, 15975, 20385, 28755, 32163, 33975, 47925, 53605, 61155, 96489, 101925, 143775, 160815, 268025, 289467, 305775, 482445, 804075, 868401, 1447335, 2412225, 4342005, 7236675, 21710025]

約数ペア:

[(1, 21710025), (3, 7236675), (5, 4342005), (9, 2412225), (15, 1447335), (25, 868401), (27, 804075), (45, 482445), (71, 305775), (75, 289467), (81, 268025), (135, 160815), (151, 143775), (213, 101925), (225, 96489), (355, 61155), (405, 53605), (453, 47925), (639, 33975), (675, 32163), (755, 28755), (1065, 20385), (1359, 15975), (1775, 12231), (1917, 11325), (2025, 10721), (2265, 9585), (3195, 6795), (3775, 5751), (4077, 5325)]