19915264

素因数分解:

$2^9\times {\mathrm{97}}^1\times {\mathrm{401}}^1$

素因数の和:516

約数の個数: 40

約数和(自身を含む): 40302108

約数和(自身を除く): 20386844

約数列:

[1, 2, 4, 8, 16, 32, 64, 97, 128, 194, 256, 388, 401, 512, 776, 802, 1552, 1604, 3104, 3208, 6208, 6416, 12416, 12832, 24832, 25664, 38897, 49664, 51328, 77794, 102656, 155588, 205312, 311176, 622352, 1244704, 2489408, 4978816, 9957632, 19915264]

約数ペア:

[(1, 19915264), (2, 9957632), (4, 4978816), (8, 2489408), (16, 1244704), (32, 622352), (64, 311176), (97, 205312), (128, 155588), (194, 102656), (256, 77794), (388, 51328), (401, 49664), (512, 38897), (776, 25664), (802, 24832), (1552, 12832), (1604, 12416), (3104, 6416), (3208, 6208)]