20409284

素因数分解:

$2^2\times 7^2\times {\mathrm{31}}^1\times {\mathrm{3359}}^1$

素因数の和:3408

約数の個数: 36

約数和(自身を含む): 42900480

約数和(自身を除く): 22491196

約数列:

[1, 2, 4, 7, 14, 28, 31, 49, 62, 98, 124, 196, 217, 434, 868, 1519, 3038, 3359, 6076, 6718, 13436, 23513, 47026, 94052, 104129, 164591, 208258, 329182, 416516, 658364, 728903, 1457806, 2915612, 5102321, 10204642, 20409284]

約数ペア:

[(1, 20409284), (2, 10204642), (4, 5102321), (7, 2915612), (14, 1457806), (28, 728903), (31, 658364), (49, 416516), (62, 329182), (98, 208258), (124, 164591), (196, 104129), (217, 94052), (434, 47026), (868, 23513), (1519, 13436), (3038, 6718), (3359, 6076)]