12680720

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{137}}^1$

素因数の和:252

約数の個数: 80

約数和(自身を含む): 32341680

約数和(自身を除く): 19660960

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 89, 104, 130, 137, 178, 208, 260, 274, 356, 445, 520, 548, 685, 712, 890, 1040, 1096, 1157, 1370, 1424, 1780, 1781, 2192, 2314, 2740, 3560, 3562, 4628, 5480, 5785, 7120, 7124, 8905, 9256, 10960, 11570, 12193, 14248, 17810, 18512, 23140, 24386, 28496, 35620, 46280, 48772, 60965, 71240, 92560, 97544, 121930, 142480, 158509, 195088, 243860, 317018, 487720, 634036, 792545, 975440, 1268072, 1585090, 2536144, 3170180, 6340360, 12680720]

約数ペア:

[(1, 12680720), (2, 6340360), (4, 3170180), (5, 2536144), (8, 1585090), (10, 1268072), (13, 975440), (16, 792545), (20, 634036), (26, 487720), (40, 317018), (52, 243860), (65, 195088), (80, 158509), (89, 142480), (104, 121930), (130, 97544), (137, 92560), (178, 71240), (208, 60965), (260, 48772), (274, 46280), (356, 35620), (445, 28496), (520, 24386), (548, 23140), (685, 18512), (712, 17810), (890, 14248), (1040, 12193), (1096, 11570), (1157, 10960), (1370, 9256), (1424, 8905), (1780, 7124), (1781, 7120), (2192, 5785), (2314, 5480), (2740, 4628), (3560, 3562)]