21556980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{127}}^1$

素因数の和:206

約数の個数: 144

約数和(自身を含む): 70447104

約数和(自身を除く): 48890124

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 23, 30, 36, 41, 45, 46, 60, 69, 82, 90, 92, 115, 123, 127, 138, 164, 180, 205, 207, 230, 246, 254, 276, 345, 369, 381, 410, 414, 460, 492, 508, 615, 635, 690, 738, 762, 820, 828, 943, 1035, 1143, 1230, 1270, 1380, 1476, 1524, 1845, 1886, 1905, 2070, 2286, 2460, 2540, 2829, 2921, 3690, 3772, 3810, 4140, 4572, 4715, 5207, 5658, 5715, 5842, 7380, 7620, 8487, 8763, 9430, 10414, 11316, 11430, 11684, 14145, 14605, 15621, 16974, 17526, 18860, 20828, 22860, 26035, 26289, 28290, 29210, 31242, 33948, 35052, 42435, 43815, 46863, 52070, 52578, 56580, 58420, 62484, 78105, 84870, 87630, 93726, 104140, 105156, 119761, 131445, 156210, 169740, 175260, 187452, 234315, 239522, 262890, 312420, 359283, 468630, 479044, 525780, 598805, 718566, 937260, 1077849, 1197610, 1437132, 1796415, 2155698, 2395220, 3592830, 4311396, 5389245, 7185660, 10778490, 21556980]

約数ペア:

[(1, 21556980), (2, 10778490), (3, 7185660), (4, 5389245), (5, 4311396), (6, 3592830), (9, 2395220), (10, 2155698), (12, 1796415), (15, 1437132), (18, 1197610), (20, 1077849), (23, 937260), (30, 718566), (36, 598805), (41, 525780), (45, 479044), (46, 468630), (60, 359283), (69, 312420), (82, 262890), (90, 239522), (92, 234315), (115, 187452), (123, 175260), (127, 169740), (138, 156210), (164, 131445), (180, 119761), (205, 105156), (207, 104140), (230, 93726), (246, 87630), (254, 84870), (276, 78105), (345, 62484), (369, 58420), (381, 56580), (410, 52578), (414, 52070), (460, 46863), (492, 43815), (508, 42435), (615, 35052), (635, 33948), (690, 31242), (738, 29210), (762, 28290), (820, 26289), (828, 26035), (943, 22860), (1035, 20828), (1143, 18860), (1230, 17526), (1270, 16974), (1380, 15621), (1476, 14605), (1524, 14145), (1845, 11684), (1886, 11430), (1905, 11316), (2070, 10414), (2286, 9430), (2460, 8763), (2540, 8487), (2829, 7620), (2921, 7380), (3690, 5842), (3772, 5715), (3810, 5658), (4140, 5207), (4572, 4715)]