21479240

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{631}}^1$

素因数の和:702

約数の個数: 64

約数和(自身を含む): 51874560

約数和(自身を除く): 30395320

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 37, 40, 46, 74, 92, 115, 148, 184, 185, 230, 296, 370, 460, 631, 740, 851, 920, 1262, 1480, 1702, 2524, 3155, 3404, 4255, 5048, 6310, 6808, 8510, 12620, 14513, 17020, 23347, 25240, 29026, 34040, 46694, 58052, 72565, 93388, 116104, 116735, 145130, 186776, 233470, 290260, 466940, 536981, 580520, 933880, 1073962, 2147924, 2684905, 4295848, 5369810, 10739620, 21479240]

約数ペア:

[(1, 21479240), (2, 10739620), (4, 5369810), (5, 4295848), (8, 2684905), (10, 2147924), (20, 1073962), (23, 933880), (37, 580520), (40, 536981), (46, 466940), (74, 290260), (92, 233470), (115, 186776), (148, 145130), (184, 116735), (185, 116104), (230, 93388), (296, 72565), (370, 58052), (460, 46694), (631, 34040), (740, 29026), (851, 25240), (920, 23347), (1262, 17020), (1480, 14513), (1702, 12620), (2524, 8510), (3155, 6808), (3404, 6310), (4255, 5048)]