19997900

素因数分解:

$2^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{15383}}^1$

素因数の和:15410

約数の個数: 36

約数和(自身を含む): 46736592

約数和(自身を除く): 26738692

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 130, 260, 325, 650, 1300, 15383, 30766, 61532, 76915, 153830, 199979, 307660, 384575, 399958, 769150, 799916, 999895, 1538300, 1999790, 3999580, 4999475, 9998950, 19997900]

約数ペア:

[(1, 19997900), (2, 9998950), (4, 4999475), (5, 3999580), (10, 1999790), (13, 1538300), (20, 999895), (25, 799916), (26, 769150), (50, 399958), (52, 384575), (65, 307660), (100, 199979), (130, 153830), (260, 76915), (325, 61532), (650, 30766), (1300, 15383)]