20016815

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1$

素因数の和:132

約数の個数: 64

約数和(自身を含む): 32175360

約数和(自身を除く): 12158545

約数列:

[1, 5, 7, 13, 29, 35, 37, 41, 65, 91, 145, 185, 203, 205, 259, 287, 377, 455, 481, 533, 1015, 1073, 1189, 1295, 1435, 1517, 1885, 2405, 2639, 2665, 3367, 3731, 5365, 5945, 7511, 7585, 8323, 10619, 13195, 13949, 15457, 16835, 18655, 19721, 37555, 41615, 43993, 53095, 69745, 77285, 97643, 98605, 108199, 138047, 219965, 307951, 488215, 540995, 571909, 690235, 1539755, 2859545, 4003363, 20016815]

約数ペア:

[(1, 20016815), (5, 4003363), (7, 2859545), (13, 1539755), (29, 690235), (35, 571909), (37, 540995), (41, 488215), (65, 307951), (91, 219965), (145, 138047), (185, 108199), (203, 98605), (205, 97643), (259, 77285), (287, 69745), (377, 53095), (455, 43993), (481, 41615), (533, 37555), (1015, 19721), (1073, 18655), (1189, 16835), (1295, 15457), (1435, 13949), (1517, 13195), (1885, 10619), (2405, 8323), (2639, 7585), (2665, 7511), (3367, 5945), (3731, 5365)]