20218510

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{173}}^1$

素因数の和:253

約数の個数: 64

約数和(自身を含む): 42094080

約数和(自身を除く): 21875570

約数列:

[1, 2, 5, 10, 13, 26, 29, 31, 58, 62, 65, 130, 145, 155, 173, 290, 310, 346, 377, 403, 754, 806, 865, 899, 1730, 1798, 1885, 2015, 2249, 3770, 4030, 4495, 4498, 5017, 5363, 8990, 10034, 10726, 11245, 11687, 22490, 23374, 25085, 26815, 50170, 53630, 58435, 65221, 69719, 116870, 130442, 139438, 155527, 311054, 326105, 348595, 652210, 697190, 777635, 1555270, 2021851, 4043702, 10109255, 20218510]

約数ペア:

[(1, 20218510), (2, 10109255), (5, 4043702), (10, 2021851), (13, 1555270), (26, 777635), (29, 697190), (31, 652210), (58, 348595), (62, 326105), (65, 311054), (130, 155527), (145, 139438), (155, 130442), (173, 116870), (290, 69719), (310, 65221), (346, 58435), (377, 53630), (403, 50170), (754, 26815), (806, 25085), (865, 23374), (899, 22490), (1730, 11687), (1798, 11245), (1885, 10726), (2015, 10034), (2249, 8990), (3770, 5363), (4030, 5017), (4495, 4498)]