21509970

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{101}}^1\times {\mathrm{229}}^1$

素因数の和:371

約数の個数: 64

約数和(自身を含む): 54051840

約数和(自身を除く): 32541870

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 31, 62, 93, 101, 155, 186, 202, 229, 303, 310, 458, 465, 505, 606, 687, 930, 1010, 1145, 1374, 1515, 2290, 3030, 3131, 3435, 6262, 6870, 7099, 9393, 14198, 15655, 18786, 21297, 23129, 31310, 35495, 42594, 46258, 46965, 69387, 70990, 93930, 106485, 115645, 138774, 212970, 231290, 346935, 693870, 716999, 1433998, 2150997, 3584995, 4301994, 7169990, 10754985, 21509970]

約数ペア:

[(1, 21509970), (2, 10754985), (3, 7169990), (5, 4301994), (6, 3584995), (10, 2150997), (15, 1433998), (30, 716999), (31, 693870), (62, 346935), (93, 231290), (101, 212970), (155, 138774), (186, 115645), (202, 106485), (229, 93930), (303, 70990), (310, 69387), (458, 46965), (465, 46258), (505, 42594), (606, 35495), (687, 31310), (930, 23129), (1010, 21297), (1145, 18786), (1374, 15655), (1515, 14198), (2290, 9393), (3030, 7099), (3131, 6870), (3435, 6262)]