20454315

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{1637}}^1$

素因数の和:1676

約数の個数: 48

約数和(自身を含む): 40334112

約数和(自身を除く): 19879797

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 49, 51, 85, 105, 119, 147, 245, 255, 357, 595, 735, 833, 1637, 1785, 2499, 4165, 4911, 8185, 11459, 12495, 24555, 27829, 34377, 57295, 80213, 83487, 139145, 171885, 194803, 240639, 401065, 417435, 584409, 974015, 1203195, 1363621, 2922045, 4090863, 6818105, 20454315]

約数ペア:

[(1, 20454315), (3, 6818105), (5, 4090863), (7, 2922045), (15, 1363621), (17, 1203195), (21, 974015), (35, 584409), (49, 417435), (51, 401065), (85, 240639), (105, 194803), (119, 171885), (147, 139145), (245, 83487), (255, 80213), (357, 57295), (595, 34377), (735, 27829), (833, 24555), (1637, 12495), (1785, 11459), (2499, 8185), (4165, 4911)]