21391180

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{137}}^1\times {\mathrm{211}}^1$

素因数の和:394

約数の個数: 48

約数和(自身を含む): 46692576

約数和(自身を除く): 25301396

約数列:

[1, 2, 4, 5, 10, 20, 37, 74, 137, 148, 185, 211, 274, 370, 422, 548, 685, 740, 844, 1055, 1370, 2110, 2740, 4220, 5069, 7807, 10138, 15614, 20276, 25345, 28907, 31228, 39035, 50690, 57814, 78070, 101380, 115628, 144535, 156140, 289070, 578140, 1069559, 2139118, 4278236, 5347795, 10695590, 21391180]

約数ペア:

[(1, 21391180), (2, 10695590), (4, 5347795), (5, 4278236), (10, 2139118), (20, 1069559), (37, 578140), (74, 289070), (137, 156140), (148, 144535), (185, 115628), (211, 101380), (274, 78070), (370, 57814), (422, 50690), (548, 39035), (685, 31228), (740, 28907), (844, 25345), (1055, 20276), (1370, 15614), (2110, 10138), (2740, 7807), (4220, 5069)]