21423920

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{571}}^1$

素因数の和:658

約数の個数: 80

約数和(自身を含む): 57877248

約数和(自身を除く): 36453328

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 67, 70, 80, 112, 134, 140, 268, 280, 335, 469, 536, 560, 571, 670, 938, 1072, 1142, 1340, 1876, 2284, 2345, 2680, 2855, 3752, 3997, 4568, 4690, 5360, 5710, 7504, 7994, 9136, 9380, 11420, 15988, 18760, 19985, 22840, 31976, 37520, 38257, 39970, 45680, 63952, 76514, 79940, 153028, 159880, 191285, 267799, 306056, 319760, 382570, 535598, 612112, 765140, 1071196, 1338995, 1530280, 2142392, 2677990, 3060560, 4284784, 5355980, 10711960, 21423920]

約数ペア:

[(1, 21423920), (2, 10711960), (4, 5355980), (5, 4284784), (7, 3060560), (8, 2677990), (10, 2142392), (14, 1530280), (16, 1338995), (20, 1071196), (28, 765140), (35, 612112), (40, 535598), (56, 382570), (67, 319760), (70, 306056), (80, 267799), (112, 191285), (134, 159880), (140, 153028), (268, 79940), (280, 76514), (335, 63952), (469, 45680), (536, 39970), (560, 38257), (571, 37520), (670, 31976), (938, 22840), (1072, 19985), (1142, 18760), (1340, 15988), (1876, 11420), (2284, 9380), (2345, 9136), (2680, 7994), (2855, 7504), (3752, 5710), (3997, 5360), (4568, 4690)]