21026680

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^2\times {\mathrm{547}}^1$

素因数の和:620

約数の個数: 48

約数和(自身を含む): 48974760

約数和(自身を除く): 27948080

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 547, 620, 961, 1094, 1240, 1922, 2188, 2735, 3844, 4376, 4805, 5470, 7688, 9610, 10940, 16957, 19220, 21880, 33914, 38440, 67828, 84785, 135656, 169570, 339140, 525667, 678280, 1051334, 2102668, 2628335, 4205336, 5256670, 10513340, 21026680]

約数ペア:

[(1, 21026680), (2, 10513340), (4, 5256670), (5, 4205336), (8, 2628335), (10, 2102668), (20, 1051334), (31, 678280), (40, 525667), (62, 339140), (124, 169570), (155, 135656), (248, 84785), (310, 67828), (547, 38440), (620, 33914), (961, 21880), (1094, 19220), (1240, 16957), (1922, 10940), (2188, 9610), (2735, 7688), (3844, 5470), (4376, 4805)]