21172970

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{439}}^1$

素因数の和:519

約数の個数: 64

約数和(自身を含む): 47900160

約数和(自身を除く): 26727190

約数列:

[1, 2, 5, 7, 10, 13, 14, 26, 35, 53, 65, 70, 91, 106, 130, 182, 265, 371, 439, 455, 530, 689, 742, 878, 910, 1378, 1855, 2195, 3073, 3445, 3710, 4390, 4823, 5707, 6146, 6890, 9646, 11414, 15365, 23267, 24115, 28535, 30730, 39949, 46534, 48230, 57070, 79898, 116335, 162869, 199745, 232670, 302471, 325738, 399490, 604942, 814345, 1512355, 1628690, 2117297, 3024710, 4234594, 10586485, 21172970]

約数ペア:

[(1, 21172970), (2, 10586485), (5, 4234594), (7, 3024710), (10, 2117297), (13, 1628690), (14, 1512355), (26, 814345), (35, 604942), (53, 399490), (65, 325738), (70, 302471), (91, 232670), (106, 199745), (130, 162869), (182, 116335), (265, 79898), (371, 57070), (439, 48230), (455, 46534), (530, 39949), (689, 30730), (742, 28535), (878, 24115), (910, 23267), (1378, 15365), (1855, 11414), (2195, 9646), (3073, 6890), (3445, 6146), (3710, 5707), (4390, 4823)]