21828765

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{1747}}^1$

素因数の和:1786

約数の個数: 48

約数和(自身を含む): 43042752

約数和(自身を除く): 21213987

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 49, 51, 85, 105, 119, 147, 245, 255, 357, 595, 735, 833, 1747, 1785, 2499, 4165, 5241, 8735, 12229, 12495, 26205, 29699, 36687, 61145, 85603, 89097, 148495, 183435, 207893, 256809, 428015, 445485, 623679, 1039465, 1284045, 1455251, 3118395, 4365753, 7276255, 21828765]

約数ペア:

[(1, 21828765), (3, 7276255), (5, 4365753), (7, 3118395), (15, 1455251), (17, 1284045), (21, 1039465), (35, 623679), (49, 445485), (51, 428015), (85, 256809), (105, 207893), (119, 183435), (147, 148495), (245, 89097), (255, 85603), (357, 61145), (595, 36687), (735, 29699), (833, 26205), (1747, 12495), (1785, 12229), (2499, 8735), (4165, 5241)]