19860640

素因数分解:

$2^5\times 5^1\times {\mathrm{101}}^1\times {\mathrm{1229}}^1$

素因数の和:1345

約数の個数: 48

約数和(自身を含む): 47423880

約数和(自身を除く): 27563240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 101, 160, 202, 404, 505, 808, 1010, 1229, 1616, 2020, 2458, 3232, 4040, 4916, 6145, 8080, 9832, 12290, 16160, 19664, 24580, 39328, 49160, 98320, 124129, 196640, 248258, 496516, 620645, 993032, 1241290, 1986064, 2482580, 3972128, 4965160, 9930320, 19860640]

約数ペア:

[(1, 19860640), (2, 9930320), (4, 4965160), (5, 3972128), (8, 2482580), (10, 1986064), (16, 1241290), (20, 993032), (32, 620645), (40, 496516), (80, 248258), (101, 196640), (160, 124129), (202, 98320), (404, 49160), (505, 39328), (808, 24580), (1010, 19664), (1229, 16160), (1616, 12290), (2020, 9832), (2458, 8080), (3232, 6145), (4040, 4916)]