21245640

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{13619}}^1$

素因数の和:13646

約数の個数: 64

約数和(自身を含む): 68644800

約数和(自身を除く): 47399160

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 24, 26, 30, 39, 40, 52, 60, 65, 78, 104, 120, 130, 156, 195, 260, 312, 390, 520, 780, 1560, 13619, 27238, 40857, 54476, 68095, 81714, 108952, 136190, 163428, 177047, 204285, 272380, 326856, 354094, 408570, 531141, 544760, 708188, 817140, 885235, 1062282, 1416376, 1634280, 1770470, 2124564, 2655705, 3540940, 4249128, 5311410, 7081880, 10622820, 21245640]

約数ペア:

[(1, 21245640), (2, 10622820), (3, 7081880), (4, 5311410), (5, 4249128), (6, 3540940), (8, 2655705), (10, 2124564), (12, 1770470), (13, 1634280), (15, 1416376), (20, 1062282), (24, 885235), (26, 817140), (30, 708188), (39, 544760), (40, 531141), (52, 408570), (60, 354094), (65, 326856), (78, 272380), (104, 204285), (120, 177047), (130, 163428), (156, 136190), (195, 108952), (260, 81714), (312, 68095), (390, 54476), (520, 40857), (780, 27238), (1560, 13619)]