21851193

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{47}}^1\times {\mathrm{131}}^1$

素因数の和:214

約数の個数: 48

約数和(自身を含む): 37103616

約数和(自身を除く): 15252423

約数列:

[1, 3, 7, 13, 21, 39, 47, 91, 131, 141, 169, 273, 329, 393, 507, 611, 917, 987, 1183, 1703, 1833, 2751, 3549, 4277, 5109, 6157, 7943, 11921, 12831, 18471, 22139, 23829, 35763, 43099, 55601, 66417, 80041, 129297, 154973, 166803, 240123, 464919, 560287, 1040533, 1680861, 3121599, 7283731, 21851193]

約数ペア:

[(1, 21851193), (3, 7283731), (7, 3121599), (13, 1680861), (21, 1040533), (39, 560287), (47, 464919), (91, 240123), (131, 166803), (141, 154973), (169, 129297), (273, 80041), (329, 66417), (393, 55601), (507, 43099), (611, 35763), (917, 23829), (987, 22139), (1183, 18471), (1703, 12831), (1833, 11921), (2751, 7943), (3549, 6157), (4277, 5109)]