21121153540

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{797}}^1\times {\mathrm{69739}}^1$

素因数の和:70564

約数の個数: 48

約数和(自身を含む): 46748116800

約数和(自身を除く): 25626963260

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 797, 1594, 3188, 3985, 7970, 15143, 15940, 30286, 60572, 69739, 75715, 139478, 151430, 278956, 302860, 348695, 697390, 1325041, 1394780, 2650082, 5300164, 6625205, 13250410, 26500820, 55581983, 111163966, 222327932, 277909915, 555819830, 1056057677, 1111639660, 2112115354, 4224230708, 5280288385, 10560576770, 21121153540]

約数ペア:

[(1, 21121153540), (2, 10560576770), (4, 5280288385), (5, 4224230708), (10, 2112115354), (19, 1111639660), (20, 1056057677), (38, 555819830), (76, 277909915), (95, 222327932), (190, 111163966), (380, 55581983), (797, 26500820), (1594, 13250410), (3188, 6625205), (3985, 5300164), (7970, 2650082), (15143, 1394780), (15940, 1325041), (30286, 697390), (60572, 348695), (69739, 302860), (75715, 278956), (139478, 151430)]