20189650

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{349}}^1$

素因数の和:463

約数の個数: 48

約数和(自身を含む): 41013000

約数和(自身を除く): 20823350

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 89, 130, 178, 325, 349, 445, 650, 698, 890, 1157, 1745, 2225, 2314, 3490, 4450, 4537, 5785, 8725, 9074, 11570, 17450, 22685, 28925, 31061, 45370, 57850, 62122, 113425, 155305, 226850, 310610, 403793, 776525, 807586, 1553050, 2018965, 4037930, 10094825, 20189650]

約数ペア:

[(1, 20189650), (2, 10094825), (5, 4037930), (10, 2018965), (13, 1553050), (25, 807586), (26, 776525), (50, 403793), (65, 310610), (89, 226850), (130, 155305), (178, 113425), (325, 62122), (349, 57850), (445, 45370), (650, 31061), (698, 28925), (890, 22685), (1157, 17450), (1745, 11570), (2225, 9074), (2314, 8725), (3490, 5785), (4450, 4537)]