21653440

素因数分解:

$2^6\times 5^1\times {\mathrm{157}}^1\times {\mathrm{431}}^1$

素因数の和:605

約数の個数: 56

約数和(自身を含む): 52011072

約数和(自身を除く): 30357632

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 157, 160, 314, 320, 431, 628, 785, 862, 1256, 1570, 1724, 2155, 2512, 3140, 3448, 4310, 5024, 6280, 6896, 8620, 10048, 12560, 13792, 17240, 25120, 27584, 34480, 50240, 67667, 68960, 135334, 137920, 270668, 338335, 541336, 676670, 1082672, 1353340, 2165344, 2706680, 4330688, 5413360, 10826720, 21653440]

約数ペア:

[(1, 21653440), (2, 10826720), (4, 5413360), (5, 4330688), (8, 2706680), (10, 2165344), (16, 1353340), (20, 1082672), (32, 676670), (40, 541336), (64, 338335), (80, 270668), (157, 137920), (160, 135334), (314, 68960), (320, 67667), (431, 50240), (628, 34480), (785, 27584), (862, 25120), (1256, 17240), (1570, 13792), (1724, 12560), (2155, 10048), (2512, 8620), (3140, 6896), (3448, 6280), (4310, 5024)]