20834560

素因数分解:

$2^8\times 5^1\times {\mathrm{41}}^1\times {\mathrm{397}}^1$

素因数の和:459

約数の個数: 72

約数和(自身を含む): 51251256

約数和(自身を除く): 30416696

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 64, 80, 82, 128, 160, 164, 205, 256, 320, 328, 397, 410, 640, 656, 794, 820, 1280, 1312, 1588, 1640, 1985, 2624, 3176, 3280, 3970, 5248, 6352, 6560, 7940, 10496, 12704, 13120, 15880, 16277, 25408, 26240, 31760, 32554, 50816, 52480, 63520, 65108, 81385, 101632, 127040, 130216, 162770, 254080, 260432, 325540, 508160, 520864, 651080, 1041728, 1302160, 2083456, 2604320, 4166912, 5208640, 10417280, 20834560]

約数ペア:

[(1, 20834560), (2, 10417280), (4, 5208640), (5, 4166912), (8, 2604320), (10, 2083456), (16, 1302160), (20, 1041728), (32, 651080), (40, 520864), (41, 508160), (64, 325540), (80, 260432), (82, 254080), (128, 162770), (160, 130216), (164, 127040), (205, 101632), (256, 81385), (320, 65108), (328, 63520), (397, 52480), (410, 50816), (640, 32554), (656, 31760), (794, 26240), (820, 25408), (1280, 16277), (1312, 15880), (1588, 13120), (1640, 12704), (1985, 10496), (2624, 7940), (3176, 6560), (3280, 6352), (3970, 5248)]