19647980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{23}}^1\times {\mathrm{353}}^1$

素因数の和:407

約数の個数: 72

約数和(自身を含む): 47458656

約数和(自身を除く): 27810676

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 23, 44, 46, 55, 92, 110, 115, 121, 220, 230, 242, 253, 353, 460, 484, 506, 605, 706, 1012, 1210, 1265, 1412, 1765, 2420, 2530, 2783, 3530, 3883, 5060, 5566, 7060, 7766, 8119, 11132, 13915, 15532, 16238, 19415, 27830, 32476, 38830, 40595, 42713, 55660, 77660, 81190, 85426, 89309, 162380, 170852, 178618, 213565, 357236, 427130, 446545, 854260, 893090, 982399, 1786180, 1964798, 3929596, 4911995, 9823990, 19647980]

約数ペア:

[(1, 19647980), (2, 9823990), (4, 4911995), (5, 3929596), (10, 1964798), (11, 1786180), (20, 982399), (22, 893090), (23, 854260), (44, 446545), (46, 427130), (55, 357236), (92, 213565), (110, 178618), (115, 170852), (121, 162380), (220, 89309), (230, 85426), (242, 81190), (253, 77660), (353, 55660), (460, 42713), (484, 40595), (506, 38830), (605, 32476), (706, 27830), (1012, 19415), (1210, 16238), (1265, 15532), (1412, 13915), (1765, 11132), (2420, 8119), (2530, 7766), (2783, 7060), (3530, 5566), (3883, 5060)]