21011220

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{113}}^1\times {\mathrm{1033}}^1$

素因数の和:1161

約数の個数: 72

約数和(自身を含む): 64360296

約数和(自身を除く): 43349076

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 113, 180, 226, 339, 452, 565, 678, 1017, 1033, 1130, 1356, 1695, 2034, 2066, 2260, 3099, 3390, 4068, 4132, 5085, 5165, 6198, 6780, 9297, 10170, 10330, 12396, 15495, 18594, 20340, 20660, 30990, 37188, 46485, 61980, 92970, 116729, 185940, 233458, 350187, 466916, 583645, 700374, 1050561, 1167290, 1400748, 1750935, 2101122, 2334580, 3501870, 4202244, 5252805, 7003740, 10505610, 21011220]

約数ペア:

[(1, 21011220), (2, 10505610), (3, 7003740), (4, 5252805), (5, 4202244), (6, 3501870), (9, 2334580), (10, 2101122), (12, 1750935), (15, 1400748), (18, 1167290), (20, 1050561), (30, 700374), (36, 583645), (45, 466916), (60, 350187), (90, 233458), (113, 185940), (180, 116729), (226, 92970), (339, 61980), (452, 46485), (565, 37188), (678, 30990), (1017, 20660), (1033, 20340), (1130, 18594), (1356, 15495), (1695, 12396), (2034, 10330), (2066, 10170), (2260, 9297), (3099, 6780), (3390, 6198), (4068, 5165), (4132, 5085)]