21578326

素因数分解:

$2^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{541}}^1$

素因数の和:605

約数の個数: 48

約数和(自身を含む): 42262992

約数和(自身を除く): 20684666

約数列:

[1, 2, 7, 11, 14, 22, 37, 49, 74, 77, 98, 154, 259, 407, 518, 539, 541, 814, 1078, 1082, 1813, 2849, 3626, 3787, 5698, 5951, 7574, 11902, 19943, 20017, 26509, 39886, 40034, 41657, 53018, 83314, 140119, 220187, 280238, 291599, 440374, 583198, 980833, 1541309, 1961666, 3082618, 10789163, 21578326]

約数ペア:

[(1, 21578326), (2, 10789163), (7, 3082618), (11, 1961666), (14, 1541309), (22, 980833), (37, 583198), (49, 440374), (74, 291599), (77, 280238), (98, 220187), (154, 140119), (259, 83314), (407, 53018), (518, 41657), (539, 40034), (541, 39886), (814, 26509), (1078, 20017), (1082, 19943), (1813, 11902), (2849, 7574), (3626, 5951), (3787, 5698)]