21184400

素因数分解:

$2^4\times 5^2\times {\mathrm{211}}^1\times {\mathrm{251}}^1$

素因数の和:480

約数の個数: 60

約数和(自身を含む): 51340464

約数和(自身を除く): 30156064

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 211, 251, 400, 422, 502, 844, 1004, 1055, 1255, 1688, 2008, 2110, 2510, 3376, 4016, 4220, 5020, 5275, 6275, 8440, 10040, 10550, 12550, 16880, 20080, 21100, 25100, 42200, 50200, 52961, 84400, 100400, 105922, 211844, 264805, 423688, 529610, 847376, 1059220, 1324025, 2118440, 2648050, 4236880, 5296100, 10592200, 21184400]

約数ペア:

[(1, 21184400), (2, 10592200), (4, 5296100), (5, 4236880), (8, 2648050), (10, 2118440), (16, 1324025), (20, 1059220), (25, 847376), (40, 529610), (50, 423688), (80, 264805), (100, 211844), (200, 105922), (211, 100400), (251, 84400), (400, 52961), (422, 50200), (502, 42200), (844, 25100), (1004, 21100), (1055, 20080), (1255, 16880), (1688, 12550), (2008, 10550), (2110, 10040), (2510, 8440), (3376, 6275), (4016, 5275), (4220, 5020)]