21139245

素因数分解:

$3^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{151}}^1$

素因数の和:243

約数の個数: 64

約数和(自身を含む): 40711680

約数和(自身を除く): 19572435

約数列:

[1, 3, 5, 9, 15, 17, 27, 45, 51, 61, 85, 135, 151, 153, 183, 255, 305, 453, 459, 549, 755, 765, 915, 1037, 1359, 1647, 2265, 2295, 2567, 2745, 3111, 4077, 5185, 6795, 7701, 8235, 9211, 9333, 12835, 15555, 20385, 23103, 27633, 27999, 38505, 46055, 46665, 69309, 82899, 115515, 138165, 139995, 156587, 248697, 346545, 414495, 469761, 782935, 1243485, 1409283, 2348805, 4227849, 7046415, 21139245]

約数ペア:

[(1, 21139245), (3, 7046415), (5, 4227849), (9, 2348805), (15, 1409283), (17, 1243485), (27, 782935), (45, 469761), (51, 414495), (61, 346545), (85, 248697), (135, 156587), (151, 139995), (153, 138165), (183, 115515), (255, 82899), (305, 69309), (453, 46665), (459, 46055), (549, 38505), (755, 27999), (765, 27633), (915, 23103), (1037, 20385), (1359, 15555), (1647, 12835), (2265, 9333), (2295, 9211), (2567, 8235), (2745, 7701), (3111, 6795), (4077, 5185)]