21056750

素因数分解:

$2^1\times 5^3\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1$

素因数の和:91

約数の個数: 128

約数和(自身を含む): 50319360

約数和(自身を除く): 29262610

約数列:

[1, 2, 5, 10, 11, 13, 19, 22, 25, 26, 31, 38, 50, 55, 62, 65, 95, 110, 125, 130, 143, 155, 190, 209, 247, 250, 275, 286, 310, 325, 341, 403, 418, 475, 494, 550, 589, 650, 682, 715, 775, 806, 950, 1045, 1178, 1235, 1375, 1430, 1550, 1625, 1705, 2015, 2090, 2375, 2470, 2717, 2750, 2945, 3250, 3410, 3575, 3875, 4030, 4433, 4750, 5225, 5434, 5890, 6175, 6479, 7150, 7657, 7750, 8525, 8866, 10075, 10450, 12350, 12958, 13585, 14725, 15314, 17050, 17875, 20150, 22165, 26125, 27170, 29450, 30875, 32395, 35750, 38285, 42625, 44330, 50375, 52250, 61750, 64790, 67925, 73625, 76570, 84227, 85250, 100750, 110825, 135850, 147250, 161975, 168454, 191425, 221650, 323950, 339625, 382850, 421135, 554125, 679250, 809875, 842270, 957125, 1108250, 1619750, 1914250, 2105675, 4211350, 10528375, 21056750]

約数ペア:

[(1, 21056750), (2, 10528375), (5, 4211350), (10, 2105675), (11, 1914250), (13, 1619750), (19, 1108250), (22, 957125), (25, 842270), (26, 809875), (31, 679250), (38, 554125), (50, 421135), (55, 382850), (62, 339625), (65, 323950), (95, 221650), (110, 191425), (125, 168454), (130, 161975), (143, 147250), (155, 135850), (190, 110825), (209, 100750), (247, 85250), (250, 84227), (275, 76570), (286, 73625), (310, 67925), (325, 64790), (341, 61750), (403, 52250), (418, 50375), (475, 44330), (494, 42625), (550, 38285), (589, 35750), (650, 32395), (682, 30875), (715, 29450), (775, 27170), (806, 26125), (950, 22165), (1045, 20150), (1178, 17875), (1235, 17050), (1375, 15314), (1430, 14725), (1550, 13585), (1625, 12958), (1705, 12350), (2015, 10450), (2090, 10075), (2375, 8866), (2470, 8525), (2717, 7750), (2750, 7657), (2945, 7150), (3250, 6479), (3410, 6175), (3575, 5890), (3875, 5434), (4030, 5225), (4433, 4750)]