640090

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{23}}^2$

素因数の和:75

約数の個数: 36

約数和(自身を含む): 1323882

約数和(自身を除く): 683792

約数列:

[1, 2, 5, 10, 11, 22, 23, 46, 55, 110, 115, 121, 230, 242, 253, 506, 529, 605, 1058, 1210, 1265, 2530, 2645, 2783, 5290, 5566, 5819, 11638, 13915, 27830, 29095, 58190, 64009, 128018, 320045, 640090]

約数ペア:

[(1, 640090), (2, 320045), (5, 128018), (10, 64009), (11, 58190), (22, 29095), (23, 27830), (46, 13915), (55, 11638), (110, 5819), (115, 5566), (121, 5290), (230, 2783), (242, 2645), (253, 2530), (506, 1265), (529, 1210), (605, 1058)]