20860740

素因数分解:

$2^2\times 3^4\times 5^1\times {\mathrm{79}}^1\times {\mathrm{163}}^1$

素因数の和:263

約数の個数: 120

約数和(自身を含む): 66675840

約数和(自身を除く): 45815100

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 79, 81, 90, 108, 135, 158, 162, 163, 180, 237, 270, 316, 324, 326, 395, 405, 474, 489, 540, 652, 711, 790, 810, 815, 948, 978, 1185, 1422, 1467, 1580, 1620, 1630, 1956, 2133, 2370, 2445, 2844, 2934, 3260, 3555, 4266, 4401, 4740, 4890, 5868, 6399, 7110, 7335, 8532, 8802, 9780, 10665, 12798, 12877, 13203, 14220, 14670, 17604, 21330, 22005, 25596, 25754, 26406, 29340, 31995, 38631, 42660, 44010, 51508, 52812, 63990, 64385, 66015, 77262, 88020, 115893, 127980, 128770, 132030, 154524, 193155, 231786, 257540, 264060, 347679, 386310, 463572, 579465, 695358, 772620, 1043037, 1158930, 1390716, 1738395, 2086074, 2317860, 3476790, 4172148, 5215185, 6953580, 10430370, 20860740]

約数ペア:

[(1, 20860740), (2, 10430370), (3, 6953580), (4, 5215185), (5, 4172148), (6, 3476790), (9, 2317860), (10, 2086074), (12, 1738395), (15, 1390716), (18, 1158930), (20, 1043037), (27, 772620), (30, 695358), (36, 579465), (45, 463572), (54, 386310), (60, 347679), (79, 264060), (81, 257540), (90, 231786), (108, 193155), (135, 154524), (158, 132030), (162, 128770), (163, 127980), (180, 115893), (237, 88020), (270, 77262), (316, 66015), (324, 64385), (326, 63990), (395, 52812), (405, 51508), (474, 44010), (489, 42660), (540, 38631), (652, 31995), (711, 29340), (790, 26406), (810, 25754), (815, 25596), (948, 22005), (978, 21330), (1185, 17604), (1422, 14670), (1467, 14220), (1580, 13203), (1620, 12877), (1630, 12798), (1956, 10665), (2133, 9780), (2370, 8802), (2445, 8532), (2844, 7335), (2934, 7110), (3260, 6399), (3555, 5868), (4266, 4890), (4401, 4740)]