21336320

素因数分解:

$2^8\times 5^1\times {\mathrm{79}}^1\times {\mathrm{211}}^1$

素因数の和:311

約数の個数: 72

約数和(自身を含む): 51999360

約数和(自身を除く): 30663040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 79, 80, 128, 158, 160, 211, 256, 316, 320, 395, 422, 632, 640, 790, 844, 1055, 1264, 1280, 1580, 1688, 2110, 2528, 3160, 3376, 4220, 5056, 6320, 6752, 8440, 10112, 12640, 13504, 16669, 16880, 20224, 25280, 27008, 33338, 33760, 50560, 54016, 66676, 67520, 83345, 101120, 133352, 135040, 166690, 266704, 270080, 333380, 533408, 666760, 1066816, 1333520, 2133632, 2667040, 4267264, 5334080, 10668160, 21336320]

約数ペア:

[(1, 21336320), (2, 10668160), (4, 5334080), (5, 4267264), (8, 2667040), (10, 2133632), (16, 1333520), (20, 1066816), (32, 666760), (40, 533408), (64, 333380), (79, 270080), (80, 266704), (128, 166690), (158, 135040), (160, 133352), (211, 101120), (256, 83345), (316, 67520), (320, 66676), (395, 54016), (422, 50560), (632, 33760), (640, 33338), (790, 27008), (844, 25280), (1055, 20224), (1264, 16880), (1280, 16669), (1580, 13504), (1688, 12640), (2110, 10112), (2528, 8440), (3160, 6752), (3376, 6320), (4220, 5056)]