71220040

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{881}}^1$

素因数の和:982

約数の個数: 64

約数和(自身を含む): 167650560

約数和(自身を除く): 96430520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 47, 86, 94, 172, 188, 215, 235, 344, 376, 430, 470, 860, 881, 940, 1720, 1762, 1880, 2021, 3524, 4042, 4405, 7048, 8084, 8810, 10105, 16168, 17620, 20210, 35240, 37883, 40420, 41407, 75766, 80840, 82814, 151532, 165628, 189415, 207035, 303064, 331256, 378830, 414070, 757660, 828140, 1515320, 1656280, 1780501, 3561002, 7122004, 8902505, 14244008, 17805010, 35610020, 71220040]

約数ペア:

[(1, 71220040), (2, 35610020), (4, 17805010), (5, 14244008), (8, 8902505), (10, 7122004), (20, 3561002), (40, 1780501), (43, 1656280), (47, 1515320), (86, 828140), (94, 757660), (172, 414070), (188, 378830), (215, 331256), (235, 303064), (344, 207035), (376, 189415), (430, 165628), (470, 151532), (860, 82814), (881, 80840), (940, 75766), (1720, 41407), (1762, 40420), (1880, 37883), (2021, 35240), (3524, 20210), (4042, 17620), (4405, 16168), (7048, 10105), (8084, 8810)]