12888980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{557}}^1$

素因数の和:668

約数の個数: 48

約数和(自身を含む): 29529360

約数和(自身を除く): 16640380

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 89, 130, 178, 260, 356, 445, 557, 890, 1114, 1157, 1780, 2228, 2314, 2785, 4628, 5570, 5785, 7241, 11140, 11570, 14482, 23140, 28964, 36205, 49573, 72410, 99146, 144820, 198292, 247865, 495730, 644449, 991460, 1288898, 2577796, 3222245, 6444490, 12888980]

約数ペア:

[(1, 12888980), (2, 6444490), (4, 3222245), (5, 2577796), (10, 1288898), (13, 991460), (20, 644449), (26, 495730), (52, 247865), (65, 198292), (89, 144820), (130, 99146), (178, 72410), (260, 49573), (356, 36205), (445, 28964), (557, 23140), (890, 14482), (1114, 11570), (1157, 11140), (1780, 7241), (2228, 5785), (2314, 5570), (2785, 4628)]