21474040

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{271}}^1\times {\mathrm{283}}^1$

素因数の和:572

約数の個数: 64

約数和(自身を含む): 55618560

約数和(自身を除く): 34144520

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 271, 280, 283, 542, 566, 1084, 1132, 1355, 1415, 1897, 1981, 2168, 2264, 2710, 2830, 3794, 3962, 5420, 5660, 7588, 7924, 9485, 9905, 10840, 11320, 15176, 15848, 18970, 19810, 37940, 39620, 75880, 76693, 79240, 153386, 306772, 383465, 536851, 613544, 766930, 1073702, 1533860, 2147404, 2684255, 3067720, 4294808, 5368510, 10737020, 21474040]

約数ペア:

[(1, 21474040), (2, 10737020), (4, 5368510), (5, 4294808), (7, 3067720), (8, 2684255), (10, 2147404), (14, 1533860), (20, 1073702), (28, 766930), (35, 613544), (40, 536851), (56, 383465), (70, 306772), (140, 153386), (271, 79240), (280, 76693), (283, 75880), (542, 39620), (566, 37940), (1084, 19810), (1132, 18970), (1355, 15848), (1415, 15176), (1897, 11320), (1981, 10840), (2168, 9905), (2264, 9485), (2710, 7924), (2830, 7588), (3794, 5660), (3962, 5420)]