18541640

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{181}}^1\times {\mathrm{197}}^1$

素因数の和:402

約数の個数: 64

約数和(自身を含む): 45405360

約数和(自身を除く): 26863720

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 181, 197, 260, 362, 394, 520, 724, 788, 905, 985, 1448, 1576, 1810, 1970, 2353, 2561, 3620, 3940, 4706, 5122, 7240, 7880, 9412, 10244, 11765, 12805, 18824, 20488, 23530, 25610, 35657, 47060, 51220, 71314, 94120, 102440, 142628, 178285, 285256, 356570, 463541, 713140, 927082, 1426280, 1854164, 2317705, 3708328, 4635410, 9270820, 18541640]

約数ペア:

[(1, 18541640), (2, 9270820), (4, 4635410), (5, 3708328), (8, 2317705), (10, 1854164), (13, 1426280), (20, 927082), (26, 713140), (40, 463541), (52, 356570), (65, 285256), (104, 178285), (130, 142628), (181, 102440), (197, 94120), (260, 71314), (362, 51220), (394, 47060), (520, 35657), (724, 25610), (788, 23530), (905, 20488), (985, 18824), (1448, 12805), (1576, 11765), (1810, 10244), (1970, 9412), (2353, 7880), (2561, 7240), (3620, 5122), (3940, 4706)]