398889340

素因数分解:

$2^2\times 5^1\times {\mathrm{269}}^1\times {\mathrm{74143}}^1$

素因数の和:74421

約数の個数: 24

約数和(自身を含む): 840792960

約数和(自身を除く): 441903620

約数列:

[1, 2, 4, 5, 10, 20, 269, 538, 1076, 1345, 2690, 5380, 74143, 148286, 296572, 370715, 741430, 1482860, 19944467, 39888934, 79777868, 99722335, 199444670, 398889340]

約数ペア:

[(1, 398889340), (2, 199444670), (4, 99722335), (5, 79777868), (10, 39888934), (20, 19944467), (269, 1482860), (538, 741430), (1076, 370715), (1345, 296572), (2690, 148286), (5380, 74143)]