20668160

素因数分解:

$2^8\times 5^1\times {\mathrm{67}}^1\times {\mathrm{241}}^1$

素因数の和:329

約数の個数: 72

約数和(自身を含む): 50454096

約数和(自身を除く): 29785936

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 67, 80, 128, 134, 160, 241, 256, 268, 320, 335, 482, 536, 640, 670, 964, 1072, 1205, 1280, 1340, 1928, 2144, 2410, 2680, 3856, 4288, 4820, 5360, 7712, 8576, 9640, 10720, 15424, 16147, 17152, 19280, 21440, 30848, 32294, 38560, 42880, 61696, 64588, 77120, 80735, 85760, 129176, 154240, 161470, 258352, 308480, 322940, 516704, 645880, 1033408, 1291760, 2066816, 2583520, 4133632, 5167040, 10334080, 20668160]

約数ペア:

[(1, 20668160), (2, 10334080), (4, 5167040), (5, 4133632), (8, 2583520), (10, 2066816), (16, 1291760), (20, 1033408), (32, 645880), (40, 516704), (64, 322940), (67, 308480), (80, 258352), (128, 161470), (134, 154240), (160, 129176), (241, 85760), (256, 80735), (268, 77120), (320, 64588), (335, 61696), (482, 42880), (536, 38560), (640, 32294), (670, 30848), (964, 21440), (1072, 19280), (1205, 17152), (1280, 16147), (1340, 15424), (1928, 10720), (2144, 9640), (2410, 8576), (2680, 7712), (3856, 5360), (4288, 4820)]