21142620

素因数分解:

$2^2\times 3^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{421}}^1$

素因数の和:473

約数の個数: 120

約数和(自身を含む): 68627328

約数和(自身を除く): 47484708

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 31, 36, 45, 54, 60, 62, 81, 90, 93, 108, 124, 135, 155, 162, 180, 186, 270, 279, 310, 324, 372, 405, 421, 465, 540, 558, 620, 810, 837, 842, 930, 1116, 1263, 1395, 1620, 1674, 1684, 1860, 2105, 2511, 2526, 2790, 3348, 3789, 4185, 4210, 5022, 5052, 5580, 6315, 7578, 8370, 8420, 10044, 11367, 12555, 12630, 13051, 15156, 16740, 18945, 22734, 25110, 25260, 26102, 34101, 37890, 39153, 45468, 50220, 52204, 56835, 65255, 68202, 75780, 78306, 113670, 117459, 130510, 136404, 156612, 170505, 195765, 227340, 234918, 261020, 341010, 352377, 391530, 469836, 587295, 682020, 704754, 783060, 1057131, 1174590, 1409508, 1761885, 2114262, 2349180, 3523770, 4228524, 5285655, 7047540, 10571310, 21142620]

約数ペア:

[(1, 21142620), (2, 10571310), (3, 7047540), (4, 5285655), (5, 4228524), (6, 3523770), (9, 2349180), (10, 2114262), (12, 1761885), (15, 1409508), (18, 1174590), (20, 1057131), (27, 783060), (30, 704754), (31, 682020), (36, 587295), (45, 469836), (54, 391530), (60, 352377), (62, 341010), (81, 261020), (90, 234918), (93, 227340), (108, 195765), (124, 170505), (135, 156612), (155, 136404), (162, 130510), (180, 117459), (186, 113670), (270, 78306), (279, 75780), (310, 68202), (324, 65255), (372, 56835), (405, 52204), (421, 50220), (465, 45468), (540, 39153), (558, 37890), (620, 34101), (810, 26102), (837, 25260), (842, 25110), (930, 22734), (1116, 18945), (1263, 16740), (1395, 15156), (1620, 13051), (1674, 12630), (1684, 12555), (1860, 11367), (2105, 10044), (2511, 8420), (2526, 8370), (2790, 7578), (3348, 6315), (3789, 5580), (4185, 5052), (4210, 5022)]