20664770

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{181}}^1\times {\mathrm{233}}^1$

素因数の和:435

約数の個数: 48

約数和(自身を含む): 43695288

約数和(自身を除く): 23030518

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 181, 233, 245, 362, 466, 490, 905, 1165, 1267, 1631, 1810, 2330, 2534, 3262, 6335, 8155, 8869, 11417, 12670, 16310, 17738, 22834, 42173, 44345, 57085, 84346, 88690, 114170, 210865, 295211, 421730, 590422, 1476055, 2066477, 2952110, 4132954, 10332385, 20664770]

約数ペア:

[(1, 20664770), (2, 10332385), (5, 4132954), (7, 2952110), (10, 2066477), (14, 1476055), (35, 590422), (49, 421730), (70, 295211), (98, 210865), (181, 114170), (233, 88690), (245, 84346), (362, 57085), (466, 44345), (490, 42173), (905, 22834), (1165, 17738), (1267, 16310), (1631, 12670), (1810, 11417), (2330, 8869), (2534, 8155), (3262, 6335)]