28742420

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{139}}^1\times {\mathrm{211}}^1$

素因数の和:373

約数の個数: 72

約数和(自身を含む): 71053920

約数和(自身を除く): 42311500

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 139, 140, 196, 211, 245, 278, 422, 490, 556, 695, 844, 973, 980, 1055, 1390, 1477, 1946, 2110, 2780, 2954, 3892, 4220, 4865, 5908, 6811, 7385, 9730, 10339, 13622, 14770, 19460, 20678, 27244, 29329, 29540, 34055, 41356, 51695, 58658, 68110, 103390, 117316, 136220, 146645, 205303, 206780, 293290, 410606, 586580, 821212, 1026515, 1437121, 2053030, 2874242, 4106060, 5748484, 7185605, 14371210, 28742420]

約数ペア:

[(1, 28742420), (2, 14371210), (4, 7185605), (5, 5748484), (7, 4106060), (10, 2874242), (14, 2053030), (20, 1437121), (28, 1026515), (35, 821212), (49, 586580), (70, 410606), (98, 293290), (139, 206780), (140, 205303), (196, 146645), (211, 136220), (245, 117316), (278, 103390), (422, 68110), (490, 58658), (556, 51695), (695, 41356), (844, 34055), (973, 29540), (980, 29329), (1055, 27244), (1390, 20678), (1477, 19460), (1946, 14770), (2110, 13622), (2780, 10339), (2954, 9730), (3892, 7385), (4220, 6811), (4865, 5908)]