21355380

素因数分解:

$2^2\times 3^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{557}}^1$

素因数の和:646

約数の個数: 96

約数和(自身を含む): 67495680

約数和(自身を除く): 46140300

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 71, 90, 108, 135, 142, 180, 213, 270, 284, 355, 426, 540, 557, 639, 710, 852, 1065, 1114, 1278, 1420, 1671, 1917, 2130, 2228, 2556, 2785, 3195, 3342, 3834, 4260, 5013, 5570, 6390, 6684, 7668, 8355, 9585, 10026, 11140, 12780, 15039, 16710, 19170, 20052, 25065, 30078, 33420, 38340, 39547, 50130, 60156, 75195, 79094, 100260, 118641, 150390, 158188, 197735, 237282, 300780, 355923, 395470, 474564, 593205, 711846, 790940, 1067769, 1186410, 1423692, 1779615, 2135538, 2372820, 3559230, 4271076, 5338845, 7118460, 10677690, 21355380]

約数ペア:

[(1, 21355380), (2, 10677690), (3, 7118460), (4, 5338845), (5, 4271076), (6, 3559230), (9, 2372820), (10, 2135538), (12, 1779615), (15, 1423692), (18, 1186410), (20, 1067769), (27, 790940), (30, 711846), (36, 593205), (45, 474564), (54, 395470), (60, 355923), (71, 300780), (90, 237282), (108, 197735), (135, 158188), (142, 150390), (180, 118641), (213, 100260), (270, 79094), (284, 75195), (355, 60156), (426, 50130), (540, 39547), (557, 38340), (639, 33420), (710, 30078), (852, 25065), (1065, 20052), (1114, 19170), (1278, 16710), (1420, 15039), (1671, 12780), (1917, 11140), (2130, 10026), (2228, 9585), (2556, 8355), (2785, 7668), (3195, 6684), (3342, 6390), (3834, 5570), (4260, 5013)]