21784930

素因数分解:

$2^1\times 5^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{503}}^1$

素因数の和:642

約数の個数: 32

約数和(自身を含む): 40497408

約数和(自身を除く): 18712478

約数列:

[1, 2, 5, 10, 61, 71, 122, 142, 305, 355, 503, 610, 710, 1006, 2515, 4331, 5030, 8662, 21655, 30683, 35713, 43310, 61366, 71426, 153415, 178565, 306830, 357130, 2178493, 4356986, 10892465, 21784930]

約数ペア:

[(1, 21784930), (2, 10892465), (5, 4356986), (10, 2178493), (61, 357130), (71, 306830), (122, 178565), (142, 153415), (305, 71426), (355, 61366), (503, 43310), (610, 35713), (710, 30683), (1006, 21655), (2515, 8662), (4331, 5030)]