21342640

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{307}}^1$

素因数の和:410

約数の個数: 80

約数和(自身を含む): 54996480

約数和(自身を除く): 33653840

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 79, 80, 88, 110, 158, 176, 220, 307, 316, 395, 440, 614, 632, 790, 869, 880, 1228, 1264, 1535, 1580, 1738, 2456, 3070, 3160, 3377, 3476, 4345, 4912, 6140, 6320, 6754, 6952, 8690, 12280, 13508, 13904, 16885, 17380, 24253, 24560, 27016, 33770, 34760, 48506, 54032, 67540, 69520, 97012, 121265, 135080, 194024, 242530, 266783, 270160, 388048, 485060, 533566, 970120, 1067132, 1333915, 1940240, 2134264, 2667830, 4268528, 5335660, 10671320, 21342640]

約数ペア:

[(1, 21342640), (2, 10671320), (4, 5335660), (5, 4268528), (8, 2667830), (10, 2134264), (11, 1940240), (16, 1333915), (20, 1067132), (22, 970120), (40, 533566), (44, 485060), (55, 388048), (79, 270160), (80, 266783), (88, 242530), (110, 194024), (158, 135080), (176, 121265), (220, 97012), (307, 69520), (316, 67540), (395, 54032), (440, 48506), (614, 34760), (632, 33770), (790, 27016), (869, 24560), (880, 24253), (1228, 17380), (1264, 16885), (1535, 13904), (1580, 13508), (1738, 12280), (2456, 8690), (3070, 6952), (3160, 6754), (3377, 6320), (3476, 6140), (4345, 4912)]