21553618

素因数分解:

$2^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{139}}^1$

素因数の和:274

約数の個数: 32

約数和(自身を含む): 34997760

約数和(自身を除く): 13444142

約数列:

[1, 2, 31, 41, 61, 62, 82, 122, 139, 278, 1271, 1891, 2501, 2542, 3782, 4309, 5002, 5699, 8479, 8618, 11398, 16958, 77531, 155062, 176669, 262849, 347639, 353338, 525698, 695278, 10776809, 21553618]

約数ペア:

[(1, 21553618), (2, 10776809), (31, 695278), (41, 525698), (61, 353338), (62, 347639), (82, 262849), (122, 176669), (139, 155062), (278, 77531), (1271, 16958), (1891, 11398), (2501, 8618), (2542, 8479), (3782, 5699), (4309, 5002)]