15996780

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{181}}^1\times {\mathrm{491}}^1$

素因数の和:687

約数の個数: 72

約数和(自身を含む): 48891024

約数和(自身を除く): 32894244

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 181, 362, 491, 543, 724, 905, 982, 1086, 1473, 1629, 1810, 1964, 2172, 2455, 2715, 2946, 3258, 3620, 4419, 4910, 5430, 5892, 6516, 7365, 8145, 8838, 9820, 10860, 14730, 16290, 17676, 22095, 29460, 32580, 44190, 88380, 88871, 177742, 266613, 355484, 444355, 533226, 799839, 888710, 1066452, 1333065, 1599678, 1777420, 2666130, 3199356, 3999195, 5332260, 7998390, 15996780]

約数ペア:

[(1, 15996780), (2, 7998390), (3, 5332260), (4, 3999195), (5, 3199356), (6, 2666130), (9, 1777420), (10, 1599678), (12, 1333065), (15, 1066452), (18, 888710), (20, 799839), (30, 533226), (36, 444355), (45, 355484), (60, 266613), (90, 177742), (180, 88871), (181, 88380), (362, 44190), (491, 32580), (543, 29460), (724, 22095), (905, 17676), (982, 16290), (1086, 14730), (1473, 10860), (1629, 9820), (1810, 8838), (1964, 8145), (2172, 7365), (2455, 6516), (2715, 5892), (2946, 5430), (3258, 4910), (3620, 4419)]