219440

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{211}}^1$

素因数の和:237

約数の個数: 40

約数和(自身を含む): 552048

約数和(自身を除く): 332608

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 211, 260, 422, 520, 844, 1040, 1055, 1688, 2110, 2743, 3376, 4220, 5486, 8440, 10972, 13715, 16880, 21944, 27430, 43888, 54860, 109720, 219440]

約数ペア:

[(1, 219440), (2, 109720), (4, 54860), (5, 43888), (8, 27430), (10, 21944), (13, 16880), (16, 13715), (20, 10972), (26, 8440), (40, 5486), (52, 4220), (65, 3376), (80, 2743), (104, 2110), (130, 1688), (208, 1055), (211, 1040), (260, 844), (422, 520)]