21612840

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{389}}^1\times {\mathrm{463}}^1$

素因数の和:866

約数の個数: 64

約数和(自身を含む): 65145600

約数和(自身を除く): 43532760

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 389, 463, 778, 926, 1167, 1389, 1556, 1852, 1945, 2315, 2334, 2778, 3112, 3704, 3890, 4630, 4668, 5556, 5835, 6945, 7780, 9260, 9336, 11112, 11670, 13890, 15560, 18520, 23340, 27780, 46680, 55560, 180107, 360214, 540321, 720428, 900535, 1080642, 1440856, 1801070, 2161284, 2701605, 3602140, 4322568, 5403210, 7204280, 10806420, 21612840]

約数ペア:

[(1, 21612840), (2, 10806420), (3, 7204280), (4, 5403210), (5, 4322568), (6, 3602140), (8, 2701605), (10, 2161284), (12, 1801070), (15, 1440856), (20, 1080642), (24, 900535), (30, 720428), (40, 540321), (60, 360214), (120, 180107), (389, 55560), (463, 46680), (778, 27780), (926, 23340), (1167, 18520), (1389, 15560), (1556, 13890), (1852, 11670), (1945, 11112), (2315, 9336), (2334, 9260), (2778, 7780), (3112, 6945), (3704, 5835), (3890, 5556), (4630, 4668)]