20813440

素因数分解:

$2^7\times 5^1\times {\mathrm{17}}^1\times {\mathrm{1913}}^1$

素因数の和:1949

約数の個数: 64

約数和(自身を含む): 52711560

約数和(自身を除く): 31898120

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 64, 68, 80, 85, 128, 136, 160, 170, 272, 320, 340, 544, 640, 680, 1088, 1360, 1913, 2176, 2720, 3826, 5440, 7652, 9565, 10880, 15304, 19130, 30608, 32521, 38260, 61216, 65042, 76520, 122432, 130084, 153040, 162605, 244864, 260168, 306080, 325210, 520336, 612160, 650420, 1040672, 1224320, 1300840, 2081344, 2601680, 4162688, 5203360, 10406720, 20813440]

約数ペア:

[(1, 20813440), (2, 10406720), (4, 5203360), (5, 4162688), (8, 2601680), (10, 2081344), (16, 1300840), (17, 1224320), (20, 1040672), (32, 650420), (34, 612160), (40, 520336), (64, 325210), (68, 306080), (80, 260168), (85, 244864), (128, 162605), (136, 153040), (160, 130084), (170, 122432), (272, 76520), (320, 65042), (340, 61216), (544, 38260), (640, 32521), (680, 30608), (1088, 19130), (1360, 15304), (1913, 10880), (2176, 9565), (2720, 7652), (3826, 5440)]