21870075

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^2\times {\mathrm{1009}}^1$

素因数の和:1056

約数の個数: 36

約数和(自身を含む): 38448680

約数和(自身を除く): 16578605

約数列:

[1, 3, 5, 15, 17, 25, 51, 75, 85, 255, 289, 425, 867, 1009, 1275, 1445, 3027, 4335, 5045, 7225, 15135, 17153, 21675, 25225, 51459, 75675, 85765, 257295, 291601, 428825, 874803, 1286475, 1458005, 4374015, 7290025, 21870075]

約数ペア:

[(1, 21870075), (3, 7290025), (5, 4374015), (15, 1458005), (17, 1286475), (25, 874803), (51, 428825), (75, 291601), (85, 257295), (255, 85765), (289, 75675), (425, 51459), (867, 25225), (1009, 21675), (1275, 17153), (1445, 15135), (3027, 7225), (4335, 5045)]