21191390

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{383}}^1\times {\mathrm{503}}^1$

素因数の和:904

約数の個数: 32

約数和(自身を含む): 41803776

約数和(自身を除く): 20612386

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 383, 503, 766, 1006, 1915, 2515, 3830, 4213, 5030, 5533, 8426, 11066, 21065, 27665, 42130, 55330, 192649, 385298, 963245, 1926490, 2119139, 4238278, 10595695, 21191390]

約数ペア:

[(1, 21191390), (2, 10595695), (5, 4238278), (10, 2119139), (11, 1926490), (22, 963245), (55, 385298), (110, 192649), (383, 55330), (503, 42130), (766, 27665), (1006, 21065), (1915, 11066), (2515, 8426), (3830, 5533), (4213, 5030)]