19490000

素因数分解:

$2^4\times 5^4\times {\mathrm{1949}}^1$

素因数の和:1977

約数の個数: 50

約数和(自身を含む): 47211450

約数和(自身を除く): 27721450

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 625, 1000, 1250, 1949, 2000, 2500, 3898, 5000, 7796, 9745, 10000, 15592, 19490, 31184, 38980, 48725, 77960, 97450, 155920, 194900, 243625, 389800, 487250, 779600, 974500, 1218125, 1949000, 2436250, 3898000, 4872500, 9745000, 19490000]

約数ペア:

[(1, 19490000), (2, 9745000), (4, 4872500), (5, 3898000), (8, 2436250), (10, 1949000), (16, 1218125), (20, 974500), (25, 779600), (40, 487250), (50, 389800), (80, 243625), (100, 194900), (125, 155920), (200, 97450), (250, 77960), (400, 48725), (500, 38980), (625, 31184), (1000, 19490), (1250, 15592), (1949, 10000), (2000, 9745), (2500, 7796), (3898, 5000)]