18905691

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{113}}^1\times {\mathrm{257}}^1$

素因数の和:411

約数の個数: 32

約数和(自身を含む): 30117888

約数和(自身を除く): 11212197

約数列:

[1, 3, 7, 21, 31, 93, 113, 217, 257, 339, 651, 771, 791, 1799, 2373, 3503, 5397, 7967, 10509, 23901, 24521, 29041, 55769, 73563, 87123, 167307, 203287, 609861, 900271, 2700813, 6301897, 18905691]

約数ペア:

[(1, 18905691), (3, 6301897), (7, 2700813), (21, 900271), (31, 609861), (93, 203287), (113, 167307), (217, 87123), (257, 73563), (339, 55769), (651, 29041), (771, 24521), (791, 23901), (1799, 10509), (2373, 7967), (3503, 5397)]