221516080

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{179}}^1\times {\mathrm{499}}^1$

素因数の和:722

約数の個数: 80

約数和(自身を含む): 535680000

約数和(自身を除く): 314163920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 80, 124, 155, 179, 248, 310, 358, 496, 499, 620, 716, 895, 998, 1240, 1432, 1790, 1996, 2480, 2495, 2864, 3580, 3992, 4990, 5549, 7160, 7984, 9980, 11098, 14320, 15469, 19960, 22196, 27745, 30938, 39920, 44392, 55490, 61876, 77345, 88784, 89321, 110980, 123752, 154690, 178642, 221960, 247504, 309380, 357284, 443920, 446605, 618760, 714568, 893210, 1237520, 1429136, 1786420, 2768951, 3572840, 5537902, 7145680, 11075804, 13844755, 22151608, 27689510, 44303216, 55379020, 110758040, 221516080]

約数ペア:

[(1, 221516080), (2, 110758040), (4, 55379020), (5, 44303216), (8, 27689510), (10, 22151608), (16, 13844755), (20, 11075804), (31, 7145680), (40, 5537902), (62, 3572840), (80, 2768951), (124, 1786420), (155, 1429136), (179, 1237520), (248, 893210), (310, 714568), (358, 618760), (496, 446605), (499, 443920), (620, 357284), (716, 309380), (895, 247504), (998, 221960), (1240, 178642), (1432, 154690), (1790, 123752), (1996, 110980), (2480, 89321), (2495, 88784), (2864, 77345), (3580, 61876), (3992, 55490), (4990, 44392), (5549, 39920), (7160, 30938), (7984, 27745), (9980, 22196), (11098, 19960), (14320, 15469)]