20704215

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{17}}^1\times {\mathrm{1657}}^1$

素因数の和:1696

約数の個数: 48

約数和(自身を含む): 40826592

約数和(自身を除く): 20122377

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 49, 51, 85, 105, 119, 147, 245, 255, 357, 595, 735, 833, 1657, 1785, 2499, 4165, 4971, 8285, 11599, 12495, 24855, 28169, 34797, 57995, 81193, 84507, 140845, 173985, 197183, 243579, 405965, 422535, 591549, 985915, 1217895, 1380281, 2957745, 4140843, 6901405, 20704215]

約数ペア:

[(1, 20704215), (3, 6901405), (5, 4140843), (7, 2957745), (15, 1380281), (17, 1217895), (21, 985915), (35, 591549), (49, 422535), (51, 405965), (85, 243579), (105, 197183), (119, 173985), (147, 140845), (245, 84507), (255, 81193), (357, 57995), (595, 34797), (735, 28169), (833, 24855), (1657, 12495), (1785, 11599), (2499, 8285), (4165, 4971)]