21354235

素因数分解:

$5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{647}}^1$

素因数の和:723

約数の個数: 32

約数和(自身を含む): 31352832

約数和(自身を除く): 9998597

約数列:

[1, 5, 7, 23, 35, 41, 115, 161, 205, 287, 647, 805, 943, 1435, 3235, 4529, 4715, 6601, 14881, 22645, 26527, 33005, 74405, 104167, 132635, 185689, 520835, 610121, 928445, 3050605, 4270847, 21354235]

約数ペア:

[(1, 21354235), (5, 4270847), (7, 3050605), (23, 928445), (35, 610121), (41, 520835), (115, 185689), (161, 132635), (205, 104167), (287, 74405), (647, 33005), (805, 26527), (943, 22645), (1435, 14881), (3235, 6601), (4529, 4715)]