21180115

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{61}}^1\times {\mathrm{107}}^1$

素因数の和:243

約数の個数: 32

約数和(自身を含む): 28926720

約数和(自身を除く): 7746605

約数列:

[1, 5, 11, 55, 59, 61, 107, 295, 305, 535, 649, 671, 1177, 3245, 3355, 3599, 5885, 6313, 6527, 17995, 31565, 32635, 39589, 69443, 71797, 197945, 347215, 358985, 385093, 1925465, 4236023, 21180115]

約数ペア:

[(1, 21180115), (5, 4236023), (11, 1925465), (55, 385093), (59, 358985), (61, 347215), (107, 197945), (295, 71797), (305, 69443), (535, 39589), (649, 32635), (671, 31565), (1177, 17995), (3245, 6527), (3355, 6313), (3599, 5885)]