21515280

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{157}}^1\times {\mathrm{571}}^1$

素因数の和:744

約数の個数: 80

約数和(自身を含む): 67239744

約数和(自身を除く): 45724464

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 157, 240, 314, 471, 571, 628, 785, 942, 1142, 1256, 1570, 1713, 1884, 2284, 2355, 2512, 2855, 3140, 3426, 3768, 4568, 4710, 5710, 6280, 6852, 7536, 8565, 9136, 9420, 11420, 12560, 13704, 17130, 18840, 22840, 27408, 34260, 37680, 45680, 68520, 89647, 137040, 179294, 268941, 358588, 448235, 537882, 717176, 896470, 1075764, 1344705, 1434352, 1792940, 2151528, 2689410, 3585880, 4303056, 5378820, 7171760, 10757640, 21515280]

約数ペア:

[(1, 21515280), (2, 10757640), (3, 7171760), (4, 5378820), (5, 4303056), (6, 3585880), (8, 2689410), (10, 2151528), (12, 1792940), (15, 1434352), (16, 1344705), (20, 1075764), (24, 896470), (30, 717176), (40, 537882), (48, 448235), (60, 358588), (80, 268941), (120, 179294), (157, 137040), (240, 89647), (314, 68520), (471, 45680), (571, 37680), (628, 34260), (785, 27408), (942, 22840), (1142, 18840), (1256, 17130), (1570, 13704), (1713, 12560), (1884, 11420), (2284, 9420), (2355, 9136), (2512, 8565), (2855, 7536), (3140, 6852), (3426, 6280), (3768, 5710), (4568, 4710)]