20455740

素因数分解:

$2^2\times 3^6\times 5^1\times {\mathrm{23}}^1\times {\mathrm{61}}^1$

素因数の和:111

約数の個数: 168

約数和(自身を含む): 68308128

約数和(自身を除く): 47852388

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 23, 27, 30, 36, 45, 46, 54, 60, 61, 69, 81, 90, 92, 108, 115, 122, 135, 138, 162, 180, 183, 207, 230, 243, 244, 270, 276, 305, 324, 345, 366, 405, 414, 460, 486, 540, 549, 610, 621, 690, 729, 732, 810, 828, 915, 972, 1035, 1098, 1215, 1220, 1242, 1380, 1403, 1458, 1620, 1647, 1830, 1863, 2070, 2196, 2430, 2484, 2745, 2806, 2916, 3105, 3294, 3645, 3660, 3726, 4140, 4209, 4860, 4941, 5490, 5589, 5612, 6210, 6588, 7015, 7290, 7452, 8235, 8418, 9315, 9882, 10980, 11178, 12420, 12627, 14030, 14580, 14823, 16470, 16767, 16836, 18630, 19764, 21045, 22356, 24705, 25254, 27945, 28060, 29646, 32940, 33534, 37260, 37881, 42090, 44469, 49410, 50508, 55890, 59292, 63135, 67068, 74115, 75762, 83835, 84180, 88938, 98820, 111780, 113643, 126270, 148230, 151524, 167670, 177876, 189405, 222345, 227286, 252540, 296460, 335340, 340929, 378810, 444690, 454572, 568215, 681858, 757620, 889380, 1022787, 1136430, 1363716, 1704645, 2045574, 2272860, 3409290, 4091148, 5113935, 6818580, 10227870, 20455740]

約数ペア:

[(1, 20455740), (2, 10227870), (3, 6818580), (4, 5113935), (5, 4091148), (6, 3409290), (9, 2272860), (10, 2045574), (12, 1704645), (15, 1363716), (18, 1136430), (20, 1022787), (23, 889380), (27, 757620), (30, 681858), (36, 568215), (45, 454572), (46, 444690), (54, 378810), (60, 340929), (61, 335340), (69, 296460), (81, 252540), (90, 227286), (92, 222345), (108, 189405), (115, 177876), (122, 167670), (135, 151524), (138, 148230), (162, 126270), (180, 113643), (183, 111780), (207, 98820), (230, 88938), (243, 84180), (244, 83835), (270, 75762), (276, 74115), (305, 67068), (324, 63135), (345, 59292), (366, 55890), (405, 50508), (414, 49410), (460, 44469), (486, 42090), (540, 37881), (549, 37260), (610, 33534), (621, 32940), (690, 29646), (729, 28060), (732, 27945), (810, 25254), (828, 24705), (915, 22356), (972, 21045), (1035, 19764), (1098, 18630), (1215, 16836), (1220, 16767), (1242, 16470), (1380, 14823), (1403, 14580), (1458, 14030), (1620, 12627), (1647, 12420), (1830, 11178), (1863, 10980), (2070, 9882), (2196, 9315), (2430, 8418), (2484, 8235), (2745, 7452), (2806, 7290), (2916, 7015), (3105, 6588), (3294, 6210), (3645, 5612), (3660, 5589), (3726, 5490), (4140, 4941), (4209, 4860)]