21099440

素因数分解:

$2^4\times 5^1\times {\mathrm{97}}^1\times {\mathrm{2719}}^1$

素因数の和:2829

約数の個数: 40

約数和(自身を含む): 49580160

約数和(自身を除く): 28480720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 97, 194, 388, 485, 776, 970, 1552, 1940, 2719, 3880, 5438, 7760, 10876, 13595, 21752, 27190, 43504, 54380, 108760, 217520, 263743, 527486, 1054972, 1318715, 2109944, 2637430, 4219888, 5274860, 10549720, 21099440]

約数ペア:

[(1, 21099440), (2, 10549720), (4, 5274860), (5, 4219888), (8, 2637430), (10, 2109944), (16, 1318715), (20, 1054972), (40, 527486), (80, 263743), (97, 217520), (194, 108760), (388, 54380), (485, 43504), (776, 27190), (970, 21752), (1552, 13595), (1940, 10876), (2719, 7760), (3880, 5438)]