20664400

素因数分解:

$2^4\times 5^2\times {\mathrm{19}}^1\times {\mathrm{2719}}^1$

素因数の和:2756

約数の個数: 60

約数和(自身を含む): 52278400

約数和(自身を除く): 31614000

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 25, 38, 40, 50, 76, 80, 95, 100, 152, 190, 200, 304, 380, 400, 475, 760, 950, 1520, 1900, 2719, 3800, 5438, 7600, 10876, 13595, 21752, 27190, 43504, 51661, 54380, 67975, 103322, 108760, 135950, 206644, 217520, 258305, 271900, 413288, 516610, 543800, 826576, 1033220, 1087600, 1291525, 2066440, 2583050, 4132880, 5166100, 10332200, 20664400]

約数ペア:

[(1, 20664400), (2, 10332200), (4, 5166100), (5, 4132880), (8, 2583050), (10, 2066440), (16, 1291525), (19, 1087600), (20, 1033220), (25, 826576), (38, 543800), (40, 516610), (50, 413288), (76, 271900), (80, 258305), (95, 217520), (100, 206644), (152, 135950), (190, 108760), (200, 103322), (304, 67975), (380, 54380), (400, 51661), (475, 43504), (760, 27190), (950, 21752), (1520, 13595), (1900, 10876), (2719, 7600), (3800, 5438)]