18208450

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{257}}^1$

素因数の和:391

約数の個数: 48

約数和(自身を含む): 36950760

約数和(自身を除く): 18742310

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 109, 130, 218, 257, 325, 514, 545, 650, 1090, 1285, 1417, 2570, 2725, 2834, 3341, 5450, 6425, 6682, 7085, 12850, 14170, 16705, 28013, 33410, 35425, 56026, 70850, 83525, 140065, 167050, 280130, 364169, 700325, 728338, 1400650, 1820845, 3641690, 9104225, 18208450]

約数ペア:

[(1, 18208450), (2, 9104225), (5, 3641690), (10, 1820845), (13, 1400650), (25, 728338), (26, 700325), (50, 364169), (65, 280130), (109, 167050), (130, 140065), (218, 83525), (257, 70850), (325, 56026), (514, 35425), (545, 33410), (650, 28013), (1090, 16705), (1285, 14170), (1417, 12850), (2570, 7085), (2725, 6682), (2834, 6425), (3341, 5450)]