17687620

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{131}}^1\times {\mathrm{157}}^1$

素因数の和:340

約数の個数: 48

約数和(自身を含む): 38541888

約数和(自身を除く): 20854268

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 131, 157, 172, 215, 262, 314, 430, 524, 628, 655, 785, 860, 1310, 1570, 2620, 3140, 5633, 6751, 11266, 13502, 20567, 22532, 27004, 28165, 33755, 41134, 56330, 67510, 82268, 102835, 112660, 135020, 205670, 411340, 884381, 1768762, 3537524, 4421905, 8843810, 17687620]

約数ペア:

[(1, 17687620), (2, 8843810), (4, 4421905), (5, 3537524), (10, 1768762), (20, 884381), (43, 411340), (86, 205670), (131, 135020), (157, 112660), (172, 102835), (215, 82268), (262, 67510), (314, 56330), (430, 41134), (524, 33755), (628, 28165), (655, 27004), (785, 22532), (860, 20567), (1310, 13502), (1570, 11266), (2620, 6751), (3140, 5633)]