21007560

素因数分解:

$2^3\times 3^1\times 5^1\times 7^1\times {\mathrm{89}}^1\times {\mathrm{281}}^1$

素因数の和:391

約数の個数: 128

約数和(自身を含む): 73094400

約数和(自身を除く): 52086840

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 89, 105, 120, 140, 168, 178, 210, 267, 280, 281, 356, 420, 445, 534, 562, 623, 712, 840, 843, 890, 1068, 1124, 1246, 1335, 1405, 1686, 1780, 1869, 1967, 2136, 2248, 2492, 2670, 2810, 3115, 3372, 3560, 3738, 3934, 4215, 4984, 5340, 5620, 5901, 6230, 6744, 7476, 7868, 8430, 9345, 9835, 10680, 11240, 11802, 12460, 14952, 15736, 16860, 18690, 19670, 23604, 24920, 25009, 29505, 33720, 37380, 39340, 47208, 50018, 59010, 74760, 75027, 78680, 100036, 118020, 125045, 150054, 175063, 200072, 236040, 250090, 300108, 350126, 375135, 500180, 525189, 600216, 700252, 750270, 875315, 1000360, 1050378, 1400504, 1500540, 1750630, 2100756, 2625945, 3001080, 3501260, 4201512, 5251890, 7002520, 10503780, 21007560]

約数ペア:

[(1, 21007560), (2, 10503780), (3, 7002520), (4, 5251890), (5, 4201512), (6, 3501260), (7, 3001080), (8, 2625945), (10, 2100756), (12, 1750630), (14, 1500540), (15, 1400504), (20, 1050378), (21, 1000360), (24, 875315), (28, 750270), (30, 700252), (35, 600216), (40, 525189), (42, 500180), (56, 375135), (60, 350126), (70, 300108), (84, 250090), (89, 236040), (105, 200072), (120, 175063), (140, 150054), (168, 125045), (178, 118020), (210, 100036), (267, 78680), (280, 75027), (281, 74760), (356, 59010), (420, 50018), (445, 47208), (534, 39340), (562, 37380), (623, 33720), (712, 29505), (840, 25009), (843, 24920), (890, 23604), (1068, 19670), (1124, 18690), (1246, 16860), (1335, 15736), (1405, 14952), (1686, 12460), (1780, 11802), (1869, 11240), (1967, 10680), (2136, 9835), (2248, 9345), (2492, 8430), (2670, 7868), (2810, 7476), (3115, 6744), (3372, 6230), (3560, 5901), (3738, 5620), (3934, 5340), (4215, 4984)]