21173704

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{155689}}^1$

素因数の和:155712

約数の個数: 16

約数和(自身を含む): 42036300

約数和(自身を除く): 20862596

約数列:

[1, 2, 4, 8, 17, 34, 68, 136, 155689, 311378, 622756, 1245512, 2646713, 5293426, 10586852, 21173704]

約数ペア:

[(1, 21173704), (2, 10586852), (4, 5293426), (8, 2646713), (17, 1245512), (34, 622756), (68, 311378), (136, 155689)]