19905100

素因数分解:

$2^2\times 5^2\times {\mathrm{31}}^1\times {\mathrm{6421}}^1$

素因数の和:6466

約数の個数: 36

約数和(自身を含む): 44594368

約数和(自身を除く): 24689268

約数列:

[1, 2, 4, 5, 10, 20, 25, 31, 50, 62, 100, 124, 155, 310, 620, 775, 1550, 3100, 6421, 12842, 25684, 32105, 64210, 128420, 160525, 199051, 321050, 398102, 642100, 796204, 995255, 1990510, 3981020, 4976275, 9952550, 19905100]

約数ペア:

[(1, 19905100), (2, 9952550), (4, 4976275), (5, 3981020), (10, 1990510), (20, 995255), (25, 796204), (31, 642100), (50, 398102), (62, 321050), (100, 199051), (124, 160525), (155, 128420), (310, 64210), (620, 32105), (775, 25684), (1550, 12842), (3100, 6421)]