21100000

素因数分解:

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

素因数の和:246

約数の個数: 72

約数和(自身を含む): 52168536

約数和(自身を除く): 31068536

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 200, 211, 250, 400, 422, 500, 625, 800, 844, 1000, 1055, 1250, 1688, 2000, 2110, 2500, 3125, 3376, 4000, 4220, 5000, 5275, 6250, 6752, 8440, 10000, 10550, 12500, 16880, 20000, 21100, 25000, 26375, 33760, 42200, 50000, 52750, 84400, 100000, 105500, 131875, 168800, 211000, 263750, 422000, 527500, 659375, 844000, 1055000, 1318750, 2110000, 2637500, 4220000, 5275000, 10550000, 21100000]

約数ペア:

[(1, 21100000), (2, 10550000), (4, 5275000), (5, 4220000), (8, 2637500), (10, 2110000), (16, 1318750), (20, 1055000), (25, 844000), (32, 659375), (40, 527500), (50, 422000), (80, 263750), (100, 211000), (125, 168800), (160, 131875), (200, 105500), (211, 100000), (250, 84400), (400, 52750), (422, 50000), (500, 42200), (625, 33760), (800, 26375), (844, 25000), (1000, 21100), (1055, 20000), (1250, 16880), (1688, 12500), (2000, 10550), (2110, 10000), (2500, 8440), (3125, 6752), (3376, 6250), (4000, 5275), (4220, 5000)]