21282290

素因数分解:

$2^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{139}}^1\times {\mathrm{251}}^1$

素因数の和:458

約数の個数: 32

約数和(自身を含む): 39372480

約数和(自身を除く): 18090190

約数列:

[1, 2, 5, 10, 61, 122, 139, 251, 278, 305, 502, 610, 695, 1255, 1390, 2510, 8479, 15311, 16958, 30622, 34889, 42395, 69778, 76555, 84790, 153110, 174445, 348890, 2128229, 4256458, 10641145, 21282290]

約数ペア:

[(1, 21282290), (2, 10641145), (5, 4256458), (10, 2128229), (61, 348890), (122, 174445), (139, 153110), (251, 84790), (278, 76555), (305, 69778), (502, 42395), (610, 34889), (695, 30622), (1255, 16958), (1390, 15311), (2510, 8479)]