19681785

素因数分解:

$3^5\times 5^1\times {\mathrm{97}}^1\times {\mathrm{167}}^1$

素因数の和:284

約数の個数: 48

約数和(自身を含む): 35957376

約数和(自身を除く): 16275591

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 97, 135, 167, 243, 291, 405, 485, 501, 835, 873, 1215, 1455, 1503, 2505, 2619, 4365, 4509, 7515, 7857, 13095, 13527, 16199, 22545, 23571, 39285, 40581, 48597, 67635, 80995, 117855, 145791, 202905, 242985, 437373, 728955, 1312119, 2186865, 3936357, 6560595, 19681785]

約数ペア:

[(1, 19681785), (3, 6560595), (5, 3936357), (9, 2186865), (15, 1312119), (27, 728955), (45, 437373), (81, 242985), (97, 202905), (135, 145791), (167, 117855), (243, 80995), (291, 67635), (405, 48597), (485, 40581), (501, 39285), (835, 23571), (873, 22545), (1215, 16199), (1455, 13527), (1503, 13095), (2505, 7857), (2619, 7515), (4365, 4509)]