21329040

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{181}}^1\times {\mathrm{491}}^1$

素因数の和:688

約数の個数: 80

約数和(自身を含む): 66620736

約数和(自身を除く): 45291696

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 181, 240, 362, 491, 543, 724, 905, 982, 1086, 1448, 1473, 1810, 1964, 2172, 2455, 2715, 2896, 2946, 3620, 3928, 4344, 4910, 5430, 5892, 7240, 7365, 7856, 8688, 9820, 10860, 11784, 14480, 14730, 19640, 21720, 23568, 29460, 39280, 43440, 58920, 88871, 117840, 177742, 266613, 355484, 444355, 533226, 710968, 888710, 1066452, 1333065, 1421936, 1777420, 2132904, 2666130, 3554840, 4265808, 5332260, 7109680, 10664520, 21329040]

約数ペア:

[(1, 21329040), (2, 10664520), (3, 7109680), (4, 5332260), (5, 4265808), (6, 3554840), (8, 2666130), (10, 2132904), (12, 1777420), (15, 1421936), (16, 1333065), (20, 1066452), (24, 888710), (30, 710968), (40, 533226), (48, 444355), (60, 355484), (80, 266613), (120, 177742), (181, 117840), (240, 88871), (362, 58920), (491, 43440), (543, 39280), (724, 29460), (905, 23568), (982, 21720), (1086, 19640), (1448, 14730), (1473, 14480), (1810, 11784), (1964, 10860), (2172, 9820), (2455, 8688), (2715, 7856), (2896, 7365), (2946, 7240), (3620, 5892), (3928, 5430), (4344, 4910)]