21531800

素因数分解:

$2^3\times 5^2\times {\mathrm{199}}^1\times {\mathrm{541}}^1$

素因数の和:756

約数の個数: 48

約数和(自身を含む): 50406000

約数和(自身を除く): 28874200

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 199, 200, 398, 541, 796, 995, 1082, 1592, 1990, 2164, 2705, 3980, 4328, 4975, 5410, 7960, 9950, 10820, 13525, 19900, 21640, 27050, 39800, 54100, 107659, 108200, 215318, 430636, 538295, 861272, 1076590, 2153180, 2691475, 4306360, 5382950, 10765900, 21531800]

約数ペア:

[(1, 21531800), (2, 10765900), (4, 5382950), (5, 4306360), (8, 2691475), (10, 2153180), (20, 1076590), (25, 861272), (40, 538295), (50, 430636), (100, 215318), (199, 108200), (200, 107659), (398, 54100), (541, 39800), (796, 27050), (995, 21640), (1082, 19900), (1592, 13525), (1990, 10820), (2164, 9950), (2705, 7960), (3980, 5410), (4328, 4975)]