21918476

素因数分解:

$2^2\times {\mathrm{19}}^2\times {\mathrm{43}}^1\times {\mathrm{353}}^1$

素因数の和:438

約数の個数: 36

約数和(自身を含む): 41541192

約数和(自身を除く): 19622716

約数列:

[1, 2, 4, 19, 38, 43, 76, 86, 172, 353, 361, 706, 722, 817, 1412, 1444, 1634, 3268, 6707, 13414, 15179, 15523, 26828, 30358, 31046, 60716, 62092, 127433, 254866, 288401, 509732, 576802, 1153604, 5479619, 10959238, 21918476]

約数ペア:

[(1, 21918476), (2, 10959238), (4, 5479619), (19, 1153604), (38, 576802), (43, 509732), (76, 288401), (86, 254866), (172, 127433), (353, 62092), (361, 60716), (706, 31046), (722, 30358), (817, 26828), (1412, 15523), (1444, 15179), (1634, 13414), (3268, 6707)]