21980252

素因数分解:

$2^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{757}}^1$

素因数の和:846

約数の個数: 48

約数和(自身を含む): 47371968

約数和(自身を除く): 25391716

約数列:

[1, 2, 4, 7, 14, 17, 28, 34, 61, 68, 119, 122, 238, 244, 427, 476, 757, 854, 1037, 1514, 1708, 2074, 3028, 4148, 5299, 7259, 10598, 12869, 14518, 21196, 25738, 29036, 46177, 51476, 90083, 92354, 180166, 184708, 323239, 360332, 646478, 785009, 1292956, 1570018, 3140036, 5495063, 10990126, 21980252]

約数ペア:

[(1, 21980252), (2, 10990126), (4, 5495063), (7, 3140036), (14, 1570018), (17, 1292956), (28, 785009), (34, 646478), (61, 360332), (68, 323239), (119, 184708), (122, 180166), (238, 92354), (244, 90083), (427, 51476), (476, 46177), (757, 29036), (854, 25738), (1037, 21196), (1514, 14518), (1708, 12869), (2074, 10598), (3028, 7259), (4148, 5299)]