20791700

素因数分解:

$2^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{353}}^1$

素因数の和:417

約数の個数: 72

約数和(自身を含む): 49163520

約数和(自身を除く): 28371820

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 31, 38, 50, 62, 76, 95, 100, 124, 155, 190, 310, 353, 380, 475, 589, 620, 706, 775, 950, 1178, 1412, 1550, 1765, 1900, 2356, 2945, 3100, 3530, 5890, 6707, 7060, 8825, 10943, 11780, 13414, 14725, 17650, 21886, 26828, 29450, 33535, 35300, 43772, 54715, 58900, 67070, 109430, 134140, 167675, 207917, 218860, 273575, 335350, 415834, 547150, 670700, 831668, 1039585, 1094300, 2079170, 4158340, 5197925, 10395850, 20791700]

約数ペア:

[(1, 20791700), (2, 10395850), (4, 5197925), (5, 4158340), (10, 2079170), (19, 1094300), (20, 1039585), (25, 831668), (31, 670700), (38, 547150), (50, 415834), (62, 335350), (76, 273575), (95, 218860), (100, 207917), (124, 167675), (155, 134140), (190, 109430), (310, 67070), (353, 58900), (380, 54715), (475, 43772), (589, 35300), (620, 33535), (706, 29450), (775, 26828), (950, 21886), (1178, 17650), (1412, 14725), (1550, 13414), (1765, 11780), (1900, 10943), (2356, 8825), (2945, 7060), (3100, 6707), (3530, 5890)]