20821047

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{307}}^1$

素因数の和:407

約数の個数: 32

約数和(自身を含む): 31460352

約数和(自身を除く): 10639305

約数列:

[1, 3, 13, 37, 39, 47, 111, 141, 307, 481, 611, 921, 1443, 1739, 1833, 3991, 5217, 11359, 11973, 14429, 22607, 34077, 43287, 67821, 147667, 187577, 443001, 533873, 562731, 1601619, 6940349, 20821047]

約数ペア:

[(1, 20821047), (3, 6940349), (13, 1601619), (37, 562731), (39, 533873), (47, 443001), (111, 187577), (141, 147667), (307, 67821), (481, 43287), (611, 34077), (921, 22607), (1443, 14429), (1739, 11973), (1833, 11359), (3991, 5217)]