20961210

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{16249}}^1$

素因数の和:16302

約数の個数: 32

約数和(自身を含む): 51480000

約数和(自身を除く): 30518790

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 43, 86, 129, 215, 258, 430, 645, 1290, 16249, 32498, 48747, 81245, 97494, 162490, 243735, 487470, 698707, 1397414, 2096121, 3493535, 4192242, 6987070, 10480605, 20961210]

約数ペア:

[(1, 20961210), (2, 10480605), (3, 6987070), (5, 4192242), (6, 3493535), (10, 2096121), (15, 1397414), (30, 698707), (43, 487470), (86, 243735), (129, 162490), (215, 97494), (258, 81245), (430, 48747), (645, 32498), (1290, 16249)]