21657537

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{223}}^1$

素因数の和:355

約数の個数: 40

約数和(自身を含む): 35777280

約数和(自身を除く): 14119743

約数列:

[1, 3, 9, 11, 27, 33, 81, 99, 109, 223, 297, 327, 669, 891, 981, 1199, 2007, 2453, 2943, 3597, 6021, 7359, 8829, 10791, 18063, 22077, 24307, 32373, 66231, 72921, 97119, 198693, 218763, 267377, 656289, 802131, 1968867, 2406393, 7219179, 21657537]

約数ペア:

[(1, 21657537), (3, 7219179), (9, 2406393), (11, 1968867), (27, 802131), (33, 656289), (81, 267377), (99, 218763), (109, 198693), (223, 97119), (297, 72921), (327, 66231), (669, 32373), (891, 24307), (981, 22077), (1199, 18063), (2007, 10791), (2453, 8829), (2943, 7359), (3597, 6021)]