20971600

素因数分解:

$2^4\times 5^2\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{109}}^1$

素因数の和:177

約数の個数: 120

約数和(自身を含む): 56237720

約数和(自身を除く): 35266120

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 37, 40, 50, 52, 65, 74, 80, 100, 104, 109, 130, 148, 185, 200, 208, 218, 260, 296, 325, 370, 400, 436, 481, 520, 545, 592, 650, 740, 872, 925, 962, 1040, 1090, 1300, 1417, 1480, 1744, 1850, 1924, 2180, 2405, 2600, 2725, 2834, 2960, 3700, 3848, 4033, 4360, 4810, 5200, 5450, 5668, 7085, 7400, 7696, 8066, 8720, 9620, 10900, 11336, 12025, 14170, 14800, 16132, 19240, 20165, 21800, 22672, 24050, 28340, 32264, 35425, 38480, 40330, 43600, 48100, 52429, 56680, 64528, 70850, 80660, 96200, 100825, 104858, 113360, 141700, 161320, 192400, 201650, 209716, 262145, 283400, 322640, 403300, 419432, 524290, 566800, 806600, 838864, 1048580, 1310725, 1613200, 2097160, 2621450, 4194320, 5242900, 10485800, 20971600]

約数ペア:

[(1, 20971600), (2, 10485800), (4, 5242900), (5, 4194320), (8, 2621450), (10, 2097160), (13, 1613200), (16, 1310725), (20, 1048580), (25, 838864), (26, 806600), (37, 566800), (40, 524290), (50, 419432), (52, 403300), (65, 322640), (74, 283400), (80, 262145), (100, 209716), (104, 201650), (109, 192400), (130, 161320), (148, 141700), (185, 113360), (200, 104858), (208, 100825), (218, 96200), (260, 80660), (296, 70850), (325, 64528), (370, 56680), (400, 52429), (436, 48100), (481, 43600), (520, 40330), (545, 38480), (592, 35425), (650, 32264), (740, 28340), (872, 24050), (925, 22672), (962, 21800), (1040, 20165), (1090, 19240), (1300, 16132), (1417, 14800), (1480, 14170), (1744, 12025), (1850, 11336), (1924, 10900), (2180, 9620), (2405, 8720), (2600, 8066), (2725, 7696), (2834, 7400), (2960, 7085), (3700, 5668), (3848, 5450), (4033, 5200), (4360, 4810)]