20280390

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{149}}^1\times {\mathrm{349}}^1$

素因数の和:521

約数の個数: 64

約数和(自身を含む): 52920000

約数和(自身を除く): 32639610

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 149, 195, 298, 349, 390, 447, 698, 745, 894, 1047, 1490, 1745, 1937, 2094, 2235, 3490, 3874, 4470, 4537, 5235, 5811, 9074, 9685, 10470, 11622, 13611, 19370, 22685, 27222, 29055, 45370, 52001, 58110, 68055, 104002, 136110, 156003, 260005, 312006, 520010, 676013, 780015, 1352026, 1560030, 2028039, 3380065, 4056078, 6760130, 10140195, 20280390]

約数ペア:

[(1, 20280390), (2, 10140195), (3, 6760130), (5, 4056078), (6, 3380065), (10, 2028039), (13, 1560030), (15, 1352026), (26, 780015), (30, 676013), (39, 520010), (65, 312006), (78, 260005), (130, 156003), (149, 136110), (195, 104002), (298, 68055), (349, 58110), (390, 52001), (447, 45370), (698, 29055), (745, 27222), (894, 22685), (1047, 19370), (1490, 13611), (1745, 11622), (1937, 10470), (2094, 9685), (2235, 9074), (3490, 5811), (3874, 5235), (4470, 4537)]