21499140

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{641}}^1$

素因数の和:709

約数の個数: 96

約数和(自身を含む): 66439296

約数和(自身を除く): 44940156

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 43, 52, 60, 65, 78, 86, 129, 130, 156, 172, 195, 215, 258, 260, 390, 430, 516, 559, 641, 645, 780, 860, 1118, 1282, 1290, 1677, 1923, 2236, 2564, 2580, 2795, 3205, 3354, 3846, 5590, 6410, 6708, 7692, 8333, 8385, 9615, 11180, 12820, 16666, 16770, 19230, 24999, 27563, 33332, 33540, 38460, 41665, 49998, 55126, 82689, 83330, 99996, 110252, 124995, 137815, 165378, 166660, 249990, 275630, 330756, 358319, 413445, 499980, 551260, 716638, 826890, 1074957, 1433276, 1653780, 1791595, 2149914, 3583190, 4299828, 5374785, 7166380, 10749570, 21499140]

約数ペア:

[(1, 21499140), (2, 10749570), (3, 7166380), (4, 5374785), (5, 4299828), (6, 3583190), (10, 2149914), (12, 1791595), (13, 1653780), (15, 1433276), (20, 1074957), (26, 826890), (30, 716638), (39, 551260), (43, 499980), (52, 413445), (60, 358319), (65, 330756), (78, 275630), (86, 249990), (129, 166660), (130, 165378), (156, 137815), (172, 124995), (195, 110252), (215, 99996), (258, 83330), (260, 82689), (390, 55126), (430, 49998), (516, 41665), (559, 38460), (641, 33540), (645, 33332), (780, 27563), (860, 24999), (1118, 19230), (1282, 16770), (1290, 16666), (1677, 12820), (1923, 11180), (2236, 9615), (2564, 8385), (2580, 8333), (2795, 7692), (3205, 6708), (3354, 6410), (3846, 5590)]