20988160

素因数分解:

$2^8\times 5^1\times {\mathrm{19}}^1\times {\mathrm{863}}^1$

素因数の和:903

約数の個数: 72

約数和(自身を含む): 52980480

約数和(自身を除く): 31992320

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 64, 76, 80, 95, 128, 152, 160, 190, 256, 304, 320, 380, 608, 640, 760, 863, 1216, 1280, 1520, 1726, 2432, 3040, 3452, 4315, 4864, 6080, 6904, 8630, 12160, 13808, 16397, 17260, 24320, 27616, 32794, 34520, 55232, 65588, 69040, 81985, 110464, 131176, 138080, 163970, 220928, 262352, 276160, 327940, 524704, 552320, 655880, 1049408, 1104640, 1311760, 2098816, 2623520, 4197632, 5247040, 10494080, 20988160]

約数ペア:

[(1, 20988160), (2, 10494080), (4, 5247040), (5, 4197632), (8, 2623520), (10, 2098816), (16, 1311760), (19, 1104640), (20, 1049408), (32, 655880), (38, 552320), (40, 524704), (64, 327940), (76, 276160), (80, 262352), (95, 220928), (128, 163970), (152, 138080), (160, 131176), (190, 110464), (256, 81985), (304, 69040), (320, 65588), (380, 55232), (608, 34520), (640, 32794), (760, 27616), (863, 24320), (1216, 17260), (1280, 16397), (1520, 13808), (1726, 12160), (2432, 8630), (3040, 6904), (3452, 6080), (4315, 4864)]