21142940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{11617}}^1$

素因数の和:11646

約数の個数: 48

約数和(自身を含む): 54651072

約数和(自身を除く): 33508132

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 1820, 11617, 23234, 46468, 58085, 81319, 116170, 151021, 162638, 232340, 302042, 325276, 406595, 604084, 755105, 813190, 1057147, 1510210, 1626380, 2114294, 3020420, 4228588, 5285735, 10571470, 21142940]

約数ペア:

[(1, 21142940), (2, 10571470), (4, 5285735), (5, 4228588), (7, 3020420), (10, 2114294), (13, 1626380), (14, 1510210), (20, 1057147), (26, 813190), (28, 755105), (35, 604084), (52, 406595), (65, 325276), (70, 302042), (91, 232340), (130, 162638), (140, 151021), (182, 116170), (260, 81319), (364, 58085), (455, 46468), (910, 23234), (1820, 11617)]