1821796720

素因数分解:

$2^4\times 5^1\times {\mathrm{61}}^1\times {\mathrm{577}}^1\times {\mathrm{647}}^1$

素因数の和:1298

約数の個数: 80

約数和(自身を含む): 4319241408

約数和(自身を除く): 2497444688

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 61, 80, 122, 244, 305, 488, 577, 610, 647, 976, 1154, 1220, 1294, 2308, 2440, 2588, 2885, 3235, 4616, 4880, 5176, 5770, 6470, 9232, 10352, 11540, 12940, 23080, 25880, 35197, 39467, 46160, 51760, 70394, 78934, 140788, 157868, 175985, 197335, 281576, 315736, 351970, 373319, 394670, 563152, 631472, 703940, 746638, 789340, 1407880, 1493276, 1578680, 1866595, 2815760, 2986552, 3157360, 3733190, 5973104, 7466380, 14932760, 22772459, 29865520, 45544918, 91089836, 113862295, 182179672, 227724590, 364359344, 455449180, 910898360, 1821796720]

約数ペア:

[(1, 1821796720), (2, 910898360), (4, 455449180), (5, 364359344), (8, 227724590), (10, 182179672), (16, 113862295), (20, 91089836), (40, 45544918), (61, 29865520), (80, 22772459), (122, 14932760), (244, 7466380), (305, 5973104), (488, 3733190), (577, 3157360), (610, 2986552), (647, 2815760), (976, 1866595), (1154, 1578680), (1220, 1493276), (1294, 1407880), (2308, 789340), (2440, 746638), (2588, 703940), (2885, 631472), (3235, 563152), (4616, 394670), (4880, 373319), (5176, 351970), (5770, 315736), (6470, 281576), (9232, 197335), (10352, 175985), (11540, 157868), (12940, 140788), (23080, 78934), (25880, 70394), (35197, 51760), (39467, 46160)]