21320475

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{601}}^1$

素因数の和:668

約数の個数: 48

約数和(自身を含む): 39414144

約数和(自身を除く): 18093669

約数列:

[1, 3, 5, 11, 15, 25, 33, 43, 55, 75, 129, 165, 215, 275, 473, 601, 645, 825, 1075, 1419, 1803, 2365, 3005, 3225, 6611, 7095, 9015, 11825, 15025, 19833, 25843, 33055, 35475, 45075, 77529, 99165, 129215, 165275, 284273, 387645, 495825, 646075, 852819, 1421365, 1938225, 4264095, 7106825, 21320475]

約数ペア:

[(1, 21320475), (3, 7106825), (5, 4264095), (11, 1938225), (15, 1421365), (25, 852819), (33, 646075), (43, 495825), (55, 387645), (75, 284273), (129, 165275), (165, 129215), (215, 99165), (275, 77529), (473, 45075), (601, 35475), (645, 33055), (825, 25843), (1075, 19833), (1419, 15025), (1803, 11825), (2365, 9015), (3005, 7095), (3225, 6611)]