20194377680

素因数分解:

$2^4\times 5^1\times {\mathrm{89}}^1\times {\mathrm{109}}^1\times {\mathrm{26021}}^1$

素因数の和:26232

約数の個数: 80

約数和(自身を含む): 47916910800

約数和(自身を除く): 27722533120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 89, 109, 178, 218, 356, 436, 445, 545, 712, 872, 890, 1090, 1424, 1744, 1780, 2180, 3560, 4360, 7120, 8720, 9701, 19402, 26021, 38804, 48505, 52042, 77608, 97010, 104084, 130105, 155216, 194020, 208168, 260210, 388040, 416336, 520420, 776080, 1040840, 2081680, 2315869, 2836289, 4631738, 5672578, 9263476, 11345156, 11579345, 14181445, 18526952, 22690312, 23158690, 28362890, 37053904, 45380624, 46317380, 56725780, 92634760, 113451560, 185269520, 226903120, 252429721, 504859442, 1009718884, 1262148605, 2019437768, 2524297210, 4038875536, 5048594420, 10097188840, 20194377680]

約数ペア:

[(1, 20194377680), (2, 10097188840), (4, 5048594420), (5, 4038875536), (8, 2524297210), (10, 2019437768), (16, 1262148605), (20, 1009718884), (40, 504859442), (80, 252429721), (89, 226903120), (109, 185269520), (178, 113451560), (218, 92634760), (356, 56725780), (436, 46317380), (445, 45380624), (545, 37053904), (712, 28362890), (872, 23158690), (890, 22690312), (1090, 18526952), (1424, 14181445), (1744, 11579345), (1780, 11345156), (2180, 9263476), (3560, 5672578), (4360, 4631738), (7120, 2836289), (8720, 2315869), (9701, 2081680), (19402, 1040840), (26021, 776080), (38804, 520420), (48505, 416336), (52042, 388040), (77608, 260210), (97010, 208168), (104084, 194020), (130105, 155216)]