19861220

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{53}}^1\times {\mathrm{457}}^1$

素因数の和:560

約数の個数: 48

約数和(自身を含む): 43627248

約数和(自身を除く): 23766028

約数列:

[1, 2, 4, 5, 10, 20, 41, 53, 82, 106, 164, 205, 212, 265, 410, 457, 530, 820, 914, 1060, 1828, 2173, 2285, 4346, 4570, 8692, 9140, 10865, 18737, 21730, 24221, 37474, 43460, 48442, 74948, 93685, 96884, 121105, 187370, 242210, 374740, 484420, 993061, 1986122, 3972244, 4965305, 9930610, 19861220]

約数ペア:

[(1, 19861220), (2, 9930610), (4, 4965305), (5, 3972244), (10, 1986122), (20, 993061), (41, 484420), (53, 374740), (82, 242210), (106, 187370), (164, 121105), (205, 96884), (212, 93685), (265, 74948), (410, 48442), (457, 43460), (530, 37474), (820, 24221), (914, 21730), (1060, 18737), (1828, 10865), (2173, 9140), (2285, 8692), (4346, 4570)]