400128

素因数分解:

$2^8\times 3^1\times {\mathrm{521}}^1$

素因数の和:540

約数の個数: 36

約数和(自身を含む): 1066968

約数和(自身を除く): 666840

約数列:

[1, 2, 3, 4, 6, 8, 12, 16, 24, 32, 48, 64, 96, 128, 192, 256, 384, 521, 768, 1042, 1563, 2084, 3126, 4168, 6252, 8336, 12504, 16672, 25008, 33344, 50016, 66688, 100032, 133376, 200064, 400128]

約数ペア:

[(1, 400128), (2, 200064), (3, 133376), (4, 100032), (6, 66688), (8, 50016), (12, 33344), (16, 25008), (24, 16672), (32, 12504), (48, 8336), (64, 6252), (96, 4168), (128, 3126), (192, 2084), (256, 1563), (384, 1042), (521, 768)]