21203820

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{10709}}^1$

素因数の和:10735

約数の個数: 72

約数和(自身を含む): 70171920

約数和(自身を除く): 48968100

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 30, 33, 36, 44, 45, 55, 60, 66, 90, 99, 110, 132, 165, 180, 198, 220, 330, 396, 495, 660, 990, 1980, 10709, 21418, 32127, 42836, 53545, 64254, 96381, 107090, 117799, 128508, 160635, 192762, 214180, 235598, 321270, 353397, 385524, 471196, 481905, 588995, 642540, 706794, 963810, 1060191, 1177990, 1413588, 1766985, 1927620, 2120382, 2355980, 3533970, 4240764, 5300955, 7067940, 10601910, 21203820]

約数ペア:

[(1, 21203820), (2, 10601910), (3, 7067940), (4, 5300955), (5, 4240764), (6, 3533970), (9, 2355980), (10, 2120382), (11, 1927620), (12, 1766985), (15, 1413588), (18, 1177990), (20, 1060191), (22, 963810), (30, 706794), (33, 642540), (36, 588995), (44, 481905), (45, 471196), (55, 385524), (60, 353397), (66, 321270), (90, 235598), (99, 214180), (110, 192762), (132, 160635), (165, 128508), (180, 117799), (198, 107090), (220, 96381), (330, 64254), (396, 53545), (495, 42836), (660, 32127), (990, 21418), (1980, 10709)]