20885860

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{1307}}^1$

素因数の和:1380

約数の個数: 48

約数和(自身を含む): 47464704

約数和(自身を除く): 26578844

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 47, 68, 85, 94, 170, 188, 235, 340, 470, 799, 940, 1307, 1598, 2614, 3196, 3995, 5228, 6535, 7990, 13070, 15980, 22219, 26140, 44438, 61429, 88876, 111095, 122858, 222190, 245716, 307145, 444380, 614290, 1044293, 1228580, 2088586, 4177172, 5221465, 10442930, 20885860]

約数ペア:

[(1, 20885860), (2, 10442930), (4, 5221465), (5, 4177172), (10, 2088586), (17, 1228580), (20, 1044293), (34, 614290), (47, 444380), (68, 307145), (85, 245716), (94, 222190), (170, 122858), (188, 111095), (235, 88876), (340, 61429), (470, 44438), (799, 26140), (940, 22219), (1307, 15980), (1598, 13070), (2614, 7990), (3196, 6535), (3995, 5228)]