20605515

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{67}}^1\times {\mathrm{101}}^1$

素因数の和:212

約数の個数: 64

約数和(自身を含む): 39951360

約数和(自身を除く): 19345845

約数列:

[1, 3, 5, 7, 15, 21, 29, 35, 67, 87, 101, 105, 145, 201, 203, 303, 335, 435, 469, 505, 609, 707, 1005, 1015, 1407, 1515, 1943, 2121, 2345, 2929, 3045, 3535, 5829, 6767, 7035, 8787, 9715, 10605, 13601, 14645, 20301, 20503, 29145, 33835, 40803, 43935, 47369, 61509, 68005, 101505, 102515, 142107, 196243, 204015, 236845, 307545, 588729, 710535, 981215, 1373701, 2943645, 4121103, 6868505, 20605515]

約数ペア:

[(1, 20605515), (3, 6868505), (5, 4121103), (7, 2943645), (15, 1373701), (21, 981215), (29, 710535), (35, 588729), (67, 307545), (87, 236845), (101, 204015), (105, 196243), (145, 142107), (201, 102515), (203, 101505), (303, 68005), (335, 61509), (435, 47369), (469, 43935), (505, 40803), (609, 33835), (707, 29145), (1005, 20503), (1015, 20301), (1407, 14645), (1515, 13601), (1943, 10605), (2121, 9715), (2345, 8787), (2929, 7035), (3045, 6767), (3535, 5829)]