665680

素因数分解:

$2^4\times 5^1\times {\mathrm{53}}^1\times {\mathrm{157}}^1$

素因数の和:223

約数の個数: 40

約数和(自身を含む): 1586952

約数和(自身を除く): 921272

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 53, 80, 106, 157, 212, 265, 314, 424, 530, 628, 785, 848, 1060, 1256, 1570, 2120, 2512, 3140, 4240, 6280, 8321, 12560, 16642, 33284, 41605, 66568, 83210, 133136, 166420, 332840, 665680]

約数ペア:

[(1, 665680), (2, 332840), (4, 166420), (5, 133136), (8, 83210), (10, 66568), (16, 41605), (20, 33284), (40, 16642), (53, 12560), (80, 8321), (106, 6280), (157, 4240), (212, 3140), (265, 2512), (314, 2120), (424, 1570), (530, 1256), (628, 1060), (785, 848)]