215380

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{89}}^1$

素因数の和:120

約数の個数: 36

約数和(自身を含む): 502740

約数和(自身を除く): 287360

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 89, 110, 121, 178, 220, 242, 356, 445, 484, 605, 890, 979, 1210, 1780, 1958, 2420, 3916, 4895, 9790, 10769, 19580, 21538, 43076, 53845, 107690, 215380]

約数ペア:

[(1, 215380), (2, 107690), (4, 53845), (5, 43076), (10, 21538), (11, 19580), (20, 10769), (22, 9790), (44, 4895), (55, 3916), (89, 2420), (110, 1958), (121, 1780), (178, 1210), (220, 979), (242, 890), (356, 605), (445, 484)]