81980420

素因数分解:

$2^2\times 5^1\times {\mathrm{587}}^1\times {\mathrm{6983}}^1$

素因数の和:7579

約数の個数: 24

約数和(自身を含む): 172476864

約数和(自身を除く): 90496444

約数列:

[1, 2, 4, 5, 10, 20, 587, 1174, 2348, 2935, 5870, 6983, 11740, 13966, 27932, 34915, 69830, 139660, 4099021, 8198042, 16396084, 20495105, 40990210, 81980420]

約数ペア:

[(1, 81980420), (2, 40990210), (4, 20495105), (5, 16396084), (10, 8198042), (20, 4099021), (587, 139660), (1174, 69830), (2348, 34915), (2935, 27932), (5870, 13966), (6983, 11740)]