1281871220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{439}}^1\times {\mathrm{20857}}^1$

素因数の和:21312

約数の個数: 48

約数和(自身を含む): 3083646720

約数和(自身を除く): 1801775500

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 439, 878, 1756, 2195, 3073, 4390, 6146, 8780, 12292, 15365, 20857, 30730, 41714, 61460, 83428, 104285, 145999, 208570, 291998, 417140, 583996, 729995, 1459990, 2919980, 9156223, 18312446, 36624892, 45781115, 64093561, 91562230, 128187122, 183124460, 256374244, 320467805, 640935610, 1281871220]

約数ペア:

[(1, 1281871220), (2, 640935610), (4, 320467805), (5, 256374244), (7, 183124460), (10, 128187122), (14, 91562230), (20, 64093561), (28, 45781115), (35, 36624892), (70, 18312446), (140, 9156223), (439, 2919980), (878, 1459990), (1756, 729995), (2195, 583996), (3073, 417140), (4390, 291998), (6146, 208570), (8780, 145999), (12292, 104285), (15365, 83428), (20857, 61460), (30730, 41714)]