21399595

素因数分解:

$5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{59}}^1\times {\mathrm{241}}^1$

素因数の和:355

約数の個数: 32

約数和(自身を含む): 30666240

約数和(自身を除く): 9266645

約数列:

[1, 5, 7, 35, 43, 59, 215, 241, 295, 301, 413, 1205, 1505, 1687, 2065, 2537, 8435, 10363, 12685, 14219, 17759, 51815, 71095, 72541, 88795, 99533, 362705, 497665, 611417, 3057085, 4279919, 21399595]

約数ペア:

[(1, 21399595), (5, 4279919), (7, 3057085), (35, 611417), (43, 497665), (59, 362705), (215, 99533), (241, 88795), (295, 72541), (301, 71095), (413, 51815), (1205, 17759), (1505, 14219), (1687, 12685), (2065, 10363), (2537, 8435)]