21745465

素因数分解:

$5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{227}}^1$

素因数の和:286

約数の個数: 48

約数和(自身を含む): 33685632

約数和(自身を除く): 11940167

約数列:

[1, 5, 7, 17, 23, 35, 49, 85, 115, 119, 161, 227, 245, 391, 595, 805, 833, 1127, 1135, 1589, 1955, 2737, 3859, 4165, 5221, 5635, 7945, 11123, 13685, 19159, 19295, 26105, 27013, 36547, 55615, 88757, 95795, 135065, 182735, 189091, 255829, 443785, 621299, 945455, 1279145, 3106495, 4349093, 21745465]

約数ペア:

[(1, 21745465), (5, 4349093), (7, 3106495), (17, 1279145), (23, 945455), (35, 621299), (49, 443785), (85, 255829), (115, 189091), (119, 182735), (161, 135065), (227, 95795), (245, 88757), (391, 55615), (595, 36547), (805, 27013), (833, 26105), (1127, 19295), (1135, 19159), (1589, 13685), (1955, 11123), (2737, 7945), (3859, 5635), (4165, 5221)]