21890220

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{1951}}^1$

素因数の和:1991

約数の個数: 96

約数和(自身を含む): 70834176

約数和(自身を除く): 48943956

約数列:

[1, 2, 3, 4, 5, 6, 10, 11, 12, 15, 17, 20, 22, 30, 33, 34, 44, 51, 55, 60, 66, 68, 85, 102, 110, 132, 165, 170, 187, 204, 220, 255, 330, 340, 374, 510, 561, 660, 748, 935, 1020, 1122, 1870, 1951, 2244, 2805, 3740, 3902, 5610, 5853, 7804, 9755, 11220, 11706, 19510, 21461, 23412, 29265, 33167, 39020, 42922, 58530, 64383, 66334, 85844, 99501, 107305, 117060, 128766, 132668, 165835, 199002, 214610, 257532, 321915, 331670, 364837, 398004, 429220, 497505, 643830, 663340, 729674, 995010, 1094511, 1287660, 1459348, 1824185, 1990020, 2189022, 3648370, 4378044, 5472555, 7296740, 10945110, 21890220]

約数ペア:

[(1, 21890220), (2, 10945110), (3, 7296740), (4, 5472555), (5, 4378044), (6, 3648370), (10, 2189022), (11, 1990020), (12, 1824185), (15, 1459348), (17, 1287660), (20, 1094511), (22, 995010), (30, 729674), (33, 663340), (34, 643830), (44, 497505), (51, 429220), (55, 398004), (60, 364837), (66, 331670), (68, 321915), (85, 257532), (102, 214610), (110, 199002), (132, 165835), (165, 132668), (170, 128766), (187, 117060), (204, 107305), (220, 99501), (255, 85844), (330, 66334), (340, 64383), (374, 58530), (510, 42922), (561, 39020), (660, 33167), (748, 29265), (935, 23412), (1020, 21461), (1122, 19510), (1870, 11706), (1951, 11220), (2244, 9755), (2805, 7804), (3740, 5853), (3902, 5610)]