21369500

素因数分解:

$2^2\times 5^3\times {\mathrm{79}}^1\times {\mathrm{541}}^1$

素因数の和:639

約数の個数: 48

約数和(自身を含む): 47349120

約数和(自身を除く): 25979620

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 79, 100, 125, 158, 250, 316, 395, 500, 541, 790, 1082, 1580, 1975, 2164, 2705, 3950, 5410, 7900, 9875, 10820, 13525, 19750, 27050, 39500, 42739, 54100, 67625, 85478, 135250, 170956, 213695, 270500, 427390, 854780, 1068475, 2136950, 4273900, 5342375, 10684750, 21369500]

約数ペア:

[(1, 21369500), (2, 10684750), (4, 5342375), (5, 4273900), (10, 2136950), (20, 1068475), (25, 854780), (50, 427390), (79, 270500), (100, 213695), (125, 170956), (158, 135250), (250, 85478), (316, 67625), (395, 54100), (500, 42739), (541, 39500), (790, 27050), (1082, 19750), (1580, 13525), (1975, 10820), (2164, 9875), (2705, 7900), (3950, 5410)]