19917688

素因数分解:

$2^3\times 7^1\times {\mathrm{179}}^1\times {\mathrm{1987}}^1$

素因数の和:2179

約数の個数: 32

約数和(自身を含む): 42940800

約数和(自身を除く): 23023112

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 179, 358, 716, 1253, 1432, 1987, 2506, 3974, 5012, 7948, 10024, 13909, 15896, 27818, 55636, 111272, 355673, 711346, 1422692, 2489711, 2845384, 4979422, 9958844, 19917688]

約数ペア:

[(1, 19917688), (2, 9958844), (4, 4979422), (7, 2845384), (8, 2489711), (14, 1422692), (28, 711346), (56, 355673), (179, 111272), (358, 55636), (716, 27818), (1253, 15896), (1432, 13909), (1987, 10024), (2506, 7948), (3974, 5012)]