21218560

素因数分解:

$2^8\times 5^1\times {\mathrm{11}}^2\times {\mathrm{137}}^1$

素因数の和:180

約数の個数: 108

約数和(自身を含む): 56273364

約数和(自身を除く): 35054804

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 64, 80, 88, 110, 121, 128, 137, 160, 176, 220, 242, 256, 274, 320, 352, 440, 484, 548, 605, 640, 685, 704, 880, 968, 1096, 1210, 1280, 1370, 1408, 1507, 1760, 1936, 2192, 2420, 2740, 2816, 3014, 3520, 3872, 4384, 4840, 5480, 6028, 7040, 7535, 7744, 8768, 9680, 10960, 12056, 14080, 15070, 15488, 16577, 17536, 19360, 21920, 24112, 30140, 30976, 33154, 35072, 38720, 43840, 48224, 60280, 66308, 77440, 82885, 87680, 96448, 120560, 132616, 154880, 165770, 175360, 192896, 241120, 265232, 331540, 385792, 482240, 530464, 663080, 964480, 1060928, 1326160, 1928960, 2121856, 2652320, 4243712, 5304640, 10609280, 21218560]

約数ペア:

[(1, 21218560), (2, 10609280), (4, 5304640), (5, 4243712), (8, 2652320), (10, 2121856), (11, 1928960), (16, 1326160), (20, 1060928), (22, 964480), (32, 663080), (40, 530464), (44, 482240), (55, 385792), (64, 331540), (80, 265232), (88, 241120), (110, 192896), (121, 175360), (128, 165770), (137, 154880), (160, 132616), (176, 120560), (220, 96448), (242, 87680), (256, 82885), (274, 77440), (320, 66308), (352, 60280), (440, 48224), (484, 43840), (548, 38720), (605, 35072), (640, 33154), (685, 30976), (704, 30140), (880, 24112), (968, 21920), (1096, 19360), (1210, 17536), (1280, 16577), (1370, 15488), (1408, 15070), (1507, 14080), (1760, 12056), (1936, 10960), (2192, 9680), (2420, 8768), (2740, 7744), (2816, 7535), (3014, 7040), (3520, 6028), (3872, 5480), (4384, 4840)]