20699217

素因数分解:

$3^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{251}}^1$

素因数の和:299

約数の個数: 72

約数和(自身を含む): 40334112

約数和(自身を除く): 19634895

約数列:

[1, 3, 7, 9, 11, 17, 21, 33, 49, 51, 63, 77, 99, 119, 147, 153, 187, 231, 251, 357, 441, 539, 561, 693, 753, 833, 1071, 1309, 1617, 1683, 1757, 2259, 2499, 2761, 3927, 4267, 4851, 5271, 7497, 8283, 9163, 11781, 12299, 12801, 15813, 19327, 24849, 27489, 29869, 36897, 38403, 46937, 57981, 82467, 89607, 110691, 135289, 140811, 173943, 209083, 268821, 328559, 405867, 422433, 627249, 985677, 1217601, 1881747, 2299913, 2957031, 6899739, 20699217]

約数ペア:

[(1, 20699217), (3, 6899739), (7, 2957031), (9, 2299913), (11, 1881747), (17, 1217601), (21, 985677), (33, 627249), (49, 422433), (51, 405867), (63, 328559), (77, 268821), (99, 209083), (119, 173943), (147, 140811), (153, 135289), (187, 110691), (231, 89607), (251, 82467), (357, 57981), (441, 46937), (539, 38403), (561, 36897), (693, 29869), (753, 27489), (833, 24849), (1071, 19327), (1309, 15813), (1617, 12801), (1683, 12299), (1757, 11781), (2259, 9163), (2499, 8283), (2761, 7497), (3927, 5271), (4267, 4851)]