28387940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{31}}^2\times {\mathrm{211}}^1$

素因数の和:289

約数の個数: 72

約数和(自身を含む): 70733376

約数和(自身を除く): 42345436

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 31, 35, 62, 70, 124, 140, 155, 211, 217, 310, 422, 434, 620, 844, 868, 961, 1055, 1085, 1477, 1922, 2110, 2170, 2954, 3844, 4220, 4340, 4805, 5908, 6541, 6727, 7385, 9610, 13082, 13454, 14770, 19220, 26164, 26908, 29540, 32705, 33635, 45787, 65410, 67270, 91574, 130820, 134540, 183148, 202771, 228935, 405542, 457870, 811084, 915740, 1013855, 1419397, 2027710, 2838794, 4055420, 5677588, 7096985, 14193970, 28387940]

約数ペア:

[(1, 28387940), (2, 14193970), (4, 7096985), (5, 5677588), (7, 4055420), (10, 2838794), (14, 2027710), (20, 1419397), (28, 1013855), (31, 915740), (35, 811084), (62, 457870), (70, 405542), (124, 228935), (140, 202771), (155, 183148), (211, 134540), (217, 130820), (310, 91574), (422, 67270), (434, 65410), (620, 45787), (844, 33635), (868, 32705), (961, 29540), (1055, 26908), (1085, 26164), (1477, 19220), (1922, 14770), (2110, 13454), (2170, 13082), (2954, 9610), (3844, 7385), (4220, 6727), (4340, 6541), (4805, 5908)]