21387008

素因数分解:

$2^8\times {\mathrm{19}}^1\times {\mathrm{4397}}^1$

素因数の和:4432

約数の個数: 36

約数和(自身を含む): 44947560

約数和(自身を除く): 23560552

約数列:

[1, 2, 4, 8, 16, 19, 32, 38, 64, 76, 128, 152, 256, 304, 608, 1216, 2432, 4397, 4864, 8794, 17588, 35176, 70352, 83543, 140704, 167086, 281408, 334172, 562816, 668344, 1125632, 1336688, 2673376, 5346752, 10693504, 21387008]

約数ペア:

[(1, 21387008), (2, 10693504), (4, 5346752), (8, 2673376), (16, 1336688), (19, 1125632), (32, 668344), (38, 562816), (64, 334172), (76, 281408), (128, 167086), (152, 140704), (256, 83543), (304, 70352), (608, 35176), (1216, 17588), (2432, 8794), (4397, 4864)]