21304240

素因数分解:

$2^4\times 5^1\times {\mathrm{283}}^1\times {\mathrm{941}}^1$

素因数の和:1237

約数の個数: 40

約数和(自身を含む): 49760208

約数和(自身を除く): 28455968

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 283, 566, 941, 1132, 1415, 1882, 2264, 2830, 3764, 4528, 4705, 5660, 7528, 9410, 11320, 15056, 18820, 22640, 37640, 75280, 266303, 532606, 1065212, 1331515, 2130424, 2663030, 4260848, 5326060, 10652120, 21304240]

約数ペア:

[(1, 21304240), (2, 10652120), (4, 5326060), (5, 4260848), (8, 2663030), (10, 2130424), (16, 1331515), (20, 1065212), (40, 532606), (80, 266303), (283, 75280), (566, 37640), (941, 22640), (1132, 18820), (1415, 15056), (1882, 11320), (2264, 9410), (2830, 7528), (3764, 5660), (4528, 4705)]