31218369

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{173}}^1\times {\mathrm{661}}^1$

素因数の和:857

約数の個数: 32

約数和(自身を含む): 51604224

約数和(自身を除く): 20385855

約数列:

[1, 3, 7, 13, 21, 39, 91, 173, 273, 519, 661, 1211, 1983, 2249, 3633, 4627, 6747, 8593, 13881, 15743, 25779, 47229, 60151, 114353, 180453, 343059, 800471, 1486589, 2401413, 4459767, 10406123, 31218369]

約数ペア:

[(1, 31218369), (3, 10406123), (7, 4459767), (13, 2401413), (21, 1486589), (39, 800471), (91, 343059), (173, 180453), (273, 114353), (519, 60151), (661, 47229), (1211, 25779), (1983, 15743), (2249, 13881), (3633, 8593), (4627, 6747)]