12786820

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{223}}^1$

素因数の和:340

約数の個数: 48

約数和(自身を含む): 27998208

約数和(自身を除く): 15211388

約数列:

[1, 2, 4, 5, 10, 20, 47, 61, 94, 122, 188, 223, 235, 244, 305, 446, 470, 610, 892, 940, 1115, 1220, 2230, 2867, 4460, 5734, 10481, 11468, 13603, 14335, 20962, 27206, 28670, 41924, 52405, 54412, 57340, 68015, 104810, 136030, 209620, 272060, 639341, 1278682, 2557364, 3196705, 6393410, 12786820]

約数ペア:

[(1, 12786820), (2, 6393410), (4, 3196705), (5, 2557364), (10, 1278682), (20, 639341), (47, 272060), (61, 209620), (94, 136030), (122, 104810), (188, 68015), (223, 57340), (235, 54412), (244, 52405), (305, 41924), (446, 28670), (470, 27206), (610, 20962), (892, 14335), (940, 13603), (1115, 11468), (1220, 10481), (2230, 5734), (2867, 4460)]