20897910

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{101}}^1$

素因数の和:155

約数の個数: 144

約数和(自身を含む): 63488880

約数和(自身を除く): 42590970

約数列:

[1, 2, 3, 5, 6, 9, 10, 11, 15, 18, 19, 22, 30, 33, 38, 45, 55, 57, 66, 90, 95, 99, 101, 110, 114, 121, 165, 171, 190, 198, 202, 209, 242, 285, 303, 330, 342, 363, 418, 495, 505, 570, 605, 606, 627, 726, 855, 909, 990, 1010, 1045, 1089, 1111, 1210, 1254, 1515, 1710, 1815, 1818, 1881, 1919, 2090, 2178, 2222, 2299, 3030, 3135, 3333, 3630, 3762, 3838, 4545, 4598, 5445, 5555, 5757, 6270, 6666, 6897, 9090, 9405, 9595, 9999, 10890, 11110, 11495, 11514, 12221, 13794, 16665, 17271, 18810, 19190, 19998, 20691, 21109, 22990, 24442, 28785, 33330, 34485, 34542, 36663, 41382, 42218, 49995, 57570, 61105, 63327, 68970, 73326, 86355, 99990, 103455, 105545, 109989, 122210, 126654, 172710, 183315, 189981, 206910, 211090, 219978, 232199, 316635, 366630, 379962, 464398, 549945, 633270, 696597, 949905, 1099890, 1160995, 1393194, 1899810, 2089791, 2321990, 3482985, 4179582, 6965970, 10448955, 20897910]

約数ペア:

[(1, 20897910), (2, 10448955), (3, 6965970), (5, 4179582), (6, 3482985), (9, 2321990), (10, 2089791), (11, 1899810), (15, 1393194), (18, 1160995), (19, 1099890), (22, 949905), (30, 696597), (33, 633270), (38, 549945), (45, 464398), (55, 379962), (57, 366630), (66, 316635), (90, 232199), (95, 219978), (99, 211090), (101, 206910), (110, 189981), (114, 183315), (121, 172710), (165, 126654), (171, 122210), (190, 109989), (198, 105545), (202, 103455), (209, 99990), (242, 86355), (285, 73326), (303, 68970), (330, 63327), (342, 61105), (363, 57570), (418, 49995), (495, 42218), (505, 41382), (570, 36663), (605, 34542), (606, 34485), (627, 33330), (726, 28785), (855, 24442), (909, 22990), (990, 21109), (1010, 20691), (1045, 19998), (1089, 19190), (1111, 18810), (1210, 17271), (1254, 16665), (1515, 13794), (1710, 12221), (1815, 11514), (1818, 11495), (1881, 11110), (1919, 10890), (2090, 9999), (2178, 9595), (2222, 9405), (2299, 9090), (3030, 6897), (3135, 6666), (3333, 6270), (3630, 5757), (3762, 5555), (3838, 5445), (4545, 4598)]