128521640

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{439}}^1\times {\mathrm{563}}^1$

素因数の和:1026

約数の個数: 64

約数和(自身を含む): 312681600

約数和(自身を除く): 184159960

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 439, 520, 563, 878, 1126, 1756, 2195, 2252, 2815, 3512, 4390, 4504, 5630, 5707, 7319, 8780, 11260, 11414, 14638, 17560, 22520, 22828, 28535, 29276, 36595, 45656, 57070, 58552, 73190, 114140, 146380, 228280, 247157, 292760, 494314, 988628, 1235785, 1977256, 2471570, 3213041, 4943140, 6426082, 9886280, 12852164, 16065205, 25704328, 32130410, 64260820, 128521640]

約数ペア:

[(1, 128521640), (2, 64260820), (4, 32130410), (5, 25704328), (8, 16065205), (10, 12852164), (13, 9886280), (20, 6426082), (26, 4943140), (40, 3213041), (52, 2471570), (65, 1977256), (104, 1235785), (130, 988628), (260, 494314), (439, 292760), (520, 247157), (563, 228280), (878, 146380), (1126, 114140), (1756, 73190), (2195, 58552), (2252, 57070), (2815, 45656), (3512, 36595), (4390, 29276), (4504, 28535), (5630, 22828), (5707, 22520), (7319, 17560), (8780, 14638), (11260, 11414)]