1990040

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1$

素因数の和:156

約数の個数: 64

約数和(自身を含む): 4989600

約数和(自身を除く): 2999560

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 43, 52, 65, 86, 89, 104, 130, 172, 178, 215, 260, 344, 356, 430, 445, 520, 559, 712, 860, 890, 1118, 1157, 1720, 1780, 2236, 2314, 2795, 3560, 3827, 4472, 4628, 5590, 5785, 7654, 9256, 11180, 11570, 15308, 19135, 22360, 23140, 30616, 38270, 46280, 49751, 76540, 99502, 153080, 199004, 248755, 398008, 497510, 995020, 1990040]

約数ペア:

[(1, 1990040), (2, 995020), (4, 497510), (5, 398008), (8, 248755), (10, 199004), (13, 153080), (20, 99502), (26, 76540), (40, 49751), (43, 46280), (52, 38270), (65, 30616), (86, 23140), (89, 22360), (104, 19135), (130, 15308), (172, 11570), (178, 11180), (215, 9256), (260, 7654), (344, 5785), (356, 5590), (430, 4628), (445, 4472), (520, 3827), (559, 3560), (712, 2795), (860, 2314), (890, 2236), (1118, 1780), (1157, 1720)]