21805875

素因数分解:

$3^3\times 5^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1$

素因数の和:115

約数の個数: 128

約数和(自身を含む): 50319360

約数和(自身を除く): 28513485

約数列:

[1, 3, 5, 7, 9, 13, 15, 21, 25, 27, 35, 39, 45, 63, 65, 71, 75, 91, 105, 117, 125, 135, 175, 189, 195, 213, 225, 273, 315, 325, 351, 355, 375, 455, 497, 525, 585, 639, 675, 819, 875, 923, 945, 975, 1065, 1125, 1365, 1491, 1575, 1625, 1755, 1775, 1917, 2275, 2457, 2485, 2625, 2769, 2925, 3195, 3375, 4095, 4473, 4615, 4725, 4875, 5325, 6461, 6825, 7455, 7875, 8307, 8775, 8875, 9585, 11375, 12285, 12425, 13419, 13845, 14625, 15975, 19383, 20475, 22365, 23075, 23625, 24921, 26625, 32305, 34125, 37275, 41535, 43875, 47925, 58149, 61425, 62125, 67095, 69225, 79875, 96915, 102375, 111825, 115375, 124605, 161525, 174447, 186375, 207675, 239625, 290745, 307125, 335475, 346125, 484575, 559125, 623025, 807625, 872235, 1038375, 1453725, 1677375, 2422875, 3115125, 4361175, 7268625, 21805875]

約数ペア:

[(1, 21805875), (3, 7268625), (5, 4361175), (7, 3115125), (9, 2422875), (13, 1677375), (15, 1453725), (21, 1038375), (25, 872235), (27, 807625), (35, 623025), (39, 559125), (45, 484575), (63, 346125), (65, 335475), (71, 307125), (75, 290745), (91, 239625), (105, 207675), (117, 186375), (125, 174447), (135, 161525), (175, 124605), (189, 115375), (195, 111825), (213, 102375), (225, 96915), (273, 79875), (315, 69225), (325, 67095), (351, 62125), (355, 61425), (375, 58149), (455, 47925), (497, 43875), (525, 41535), (585, 37275), (639, 34125), (675, 32305), (819, 26625), (875, 24921), (923, 23625), (945, 23075), (975, 22365), (1065, 20475), (1125, 19383), (1365, 15975), (1491, 14625), (1575, 13845), (1625, 13419), (1755, 12425), (1775, 12285), (1917, 11375), (2275, 9585), (2457, 8875), (2485, 8775), (2625, 8307), (2769, 7875), (2925, 7455), (3195, 6825), (3375, 6461), (4095, 5325), (4473, 4875), (4615, 4725)]