27980980

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^2\times {\mathrm{47}}^1\times {\mathrm{103}}^1$

素因数の和:193

約数の個数: 72

約数和(自身を含む): 64366848

約数和(自身を除く): 36385868

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 47, 68, 85, 94, 103, 170, 188, 206, 235, 289, 340, 412, 470, 515, 578, 799, 940, 1030, 1156, 1445, 1598, 1751, 2060, 2890, 3196, 3502, 3995, 4841, 5780, 7004, 7990, 8755, 9682, 13583, 15980, 17510, 19364, 24205, 27166, 29767, 35020, 48410, 54332, 59534, 67915, 82297, 96820, 119068, 135830, 148835, 164594, 271660, 297670, 329188, 411485, 595340, 822970, 1399049, 1645940, 2798098, 5596196, 6995245, 13990490, 27980980]

約数ペア:

[(1, 27980980), (2, 13990490), (4, 6995245), (5, 5596196), (10, 2798098), (17, 1645940), (20, 1399049), (34, 822970), (47, 595340), (68, 411485), (85, 329188), (94, 297670), (103, 271660), (170, 164594), (188, 148835), (206, 135830), (235, 119068), (289, 96820), (340, 82297), (412, 67915), (470, 59534), (515, 54332), (578, 48410), (799, 35020), (940, 29767), (1030, 27166), (1156, 24205), (1445, 19364), (1598, 17510), (1751, 15980), (2060, 13583), (2890, 9682), (3196, 8755), (3502, 7990), (3995, 7004), (4841, 5780)]