21649250

素因数分解:

$2^1\times 5^3\times 7^1\times {\mathrm{89}}^1\times {\mathrm{139}}^1$

素因数の和:252

約数の個数: 64

約数和(自身を含む): 47174400

約数和(自身を除く): 25525150

約数列:

[1, 2, 5, 7, 10, 14, 25, 35, 50, 70, 89, 125, 139, 175, 178, 250, 278, 350, 445, 623, 695, 875, 890, 973, 1246, 1390, 1750, 1946, 2225, 3115, 3475, 4450, 4865, 6230, 6950, 9730, 11125, 12371, 15575, 17375, 22250, 24325, 24742, 31150, 34750, 48650, 61855, 77875, 86597, 121625, 123710, 155750, 173194, 243250, 309275, 432985, 618550, 865970, 1546375, 2164925, 3092750, 4329850, 10824625, 21649250]

約数ペア:

[(1, 21649250), (2, 10824625), (5, 4329850), (7, 3092750), (10, 2164925), (14, 1546375), (25, 865970), (35, 618550), (50, 432985), (70, 309275), (89, 243250), (125, 173194), (139, 155750), (175, 123710), (178, 121625), (250, 86597), (278, 77875), (350, 61855), (445, 48650), (623, 34750), (695, 31150), (875, 24742), (890, 24325), (973, 22250), (1246, 17375), (1390, 15575), (1750, 12371), (1946, 11125), (2225, 9730), (3115, 6950), (3475, 6230), (4450, 4865)]