1981579520

素因数分解:

$2^8\times 5^1\times {\mathrm{31}}^1\times {\mathrm{49939}}^1$

素因数の和:49991

約数の個数: 72

約数和(自身を含む): 4899713280

約数和(自身を除く): 2918133760

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 256, 310, 320, 496, 620, 640, 992, 1240, 1280, 1984, 2480, 3968, 4960, 7936, 9920, 19840, 39680, 49939, 99878, 199756, 249695, 399512, 499390, 799024, 998780, 1548109, 1598048, 1997560, 3096218, 3196096, 3995120, 6192436, 6392192, 7740545, 7990240, 12384872, 12784384, 15481090, 15980480, 24769744, 30962180, 31960960, 49539488, 61924360, 63921920, 99078976, 123848720, 198157952, 247697440, 396315904, 495394880, 990789760, 1981579520]

約数ペア:

[(1, 1981579520), (2, 990789760), (4, 495394880), (5, 396315904), (8, 247697440), (10, 198157952), (16, 123848720), (20, 99078976), (31, 63921920), (32, 61924360), (40, 49539488), (62, 31960960), (64, 30962180), (80, 24769744), (124, 15980480), (128, 15481090), (155, 12784384), (160, 12384872), (248, 7990240), (256, 7740545), (310, 6392192), (320, 6192436), (496, 3995120), (620, 3196096), (640, 3096218), (992, 1997560), (1240, 1598048), (1280, 1548109), (1984, 998780), (2480, 799024), (3968, 499390), (4960, 399512), (7936, 249695), (9920, 199756), (19840, 99878), (39680, 49939)]