20442880

素因数分解:

$2^8\times 5^1\times {\mathrm{15971}}^1$

素因数の和:15992

約数の個数: 36

約数和(自身を含む): 48970152

約数和(自身を除く): 28527272

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 15971, 31942, 63884, 79855, 127768, 159710, 255536, 319420, 511072, 638840, 1022144, 1277680, 2044288, 2555360, 4088576, 5110720, 10221440, 20442880]

約数ペア:

[(1, 20442880), (2, 10221440), (4, 5110720), (5, 4088576), (8, 2555360), (10, 2044288), (16, 1277680), (20, 1022144), (32, 638840), (40, 511072), (64, 319420), (80, 255536), (128, 159710), (160, 127768), (256, 79855), (320, 63884), (640, 31942), (1280, 15971)]