19778580

素因数分解:

$2^2\times 3^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{421}}^1$

素因数の和:471

約数の個数: 120

約数和(自身を含む): 64338120

約数和(自身を除く): 44559540

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 29, 30, 36, 45, 54, 58, 60, 81, 87, 90, 108, 116, 135, 145, 162, 174, 180, 261, 270, 290, 324, 348, 405, 421, 435, 522, 540, 580, 783, 810, 842, 870, 1044, 1263, 1305, 1566, 1620, 1684, 1740, 2105, 2349, 2526, 2610, 3132, 3789, 3915, 4210, 4698, 5052, 5220, 6315, 7578, 7830, 8420, 9396, 11367, 11745, 12209, 12630, 15156, 15660, 18945, 22734, 23490, 24418, 25260, 34101, 36627, 37890, 45468, 46980, 48836, 56835, 61045, 68202, 73254, 75780, 109881, 113670, 122090, 136404, 146508, 170505, 183135, 219762, 227340, 244180, 329643, 341010, 366270, 439524, 549405, 659286, 682020, 732540, 988929, 1098810, 1318572, 1648215, 1977858, 2197620, 3296430, 3955716, 4944645, 6592860, 9889290, 19778580]

約数ペア:

[(1, 19778580), (2, 9889290), (3, 6592860), (4, 4944645), (5, 3955716), (6, 3296430), (9, 2197620), (10, 1977858), (12, 1648215), (15, 1318572), (18, 1098810), (20, 988929), (27, 732540), (29, 682020), (30, 659286), (36, 549405), (45, 439524), (54, 366270), (58, 341010), (60, 329643), (81, 244180), (87, 227340), (90, 219762), (108, 183135), (116, 170505), (135, 146508), (145, 136404), (162, 122090), (174, 113670), (180, 109881), (261, 75780), (270, 73254), (290, 68202), (324, 61045), (348, 56835), (405, 48836), (421, 46980), (435, 45468), (522, 37890), (540, 36627), (580, 34101), (783, 25260), (810, 24418), (842, 23490), (870, 22734), (1044, 18945), (1263, 15660), (1305, 15156), (1566, 12630), (1620, 12209), (1684, 11745), (1740, 11367), (2105, 9396), (2349, 8420), (2526, 7830), (2610, 7578), (3132, 6315), (3789, 5220), (3915, 5052), (4210, 4698)]