21716415

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{971}}^1$

素因数の和:1060

約数の個数: 48

約数和(自身を含む): 43670016

約数和(自身を除く): 21953601

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 71, 105, 213, 315, 355, 497, 639, 971, 1065, 1491, 2485, 2913, 3195, 4473, 4855, 6797, 7455, 8739, 14565, 20391, 22365, 33985, 43695, 61173, 68941, 101955, 206823, 305865, 344705, 482587, 620469, 1034115, 1447761, 2412935, 3102345, 4343283, 7238805, 21716415]

約数ペア:

[(1, 21716415), (3, 7238805), (5, 4343283), (7, 3102345), (9, 2412935), (15, 1447761), (21, 1034115), (35, 620469), (45, 482587), (63, 344705), (71, 305865), (105, 206823), (213, 101955), (315, 68941), (355, 61173), (497, 43695), (639, 33985), (971, 22365), (1065, 20391), (1491, 14565), (2485, 8739), (2913, 7455), (3195, 6797), (4473, 4855)]