20805650

素因数分解:

$2^1\times 5^2\times {\mathrm{31}}^2\times {\mathrm{433}}^1$

素因数の和:507

約数の個数: 36

約数和(自身を含む): 40079466

約数和(自身を除く): 19273816

約数列:

[1, 2, 5, 10, 25, 31, 50, 62, 155, 310, 433, 775, 866, 961, 1550, 1922, 2165, 4330, 4805, 9610, 10825, 13423, 21650, 24025, 26846, 48050, 67115, 134230, 335575, 416113, 671150, 832226, 2080565, 4161130, 10402825, 20805650]

約数ペア:

[(1, 20805650), (2, 10402825), (5, 4161130), (10, 2080565), (25, 832226), (31, 671150), (50, 416113), (62, 335575), (155, 134230), (310, 67115), (433, 48050), (775, 26846), (866, 24025), (961, 21650), (1550, 13423), (1922, 10825), (2165, 9610), (4330, 4805)]