21008940

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{479}}^1$

素因数の和:551

約数の個数: 96

約数和(自身を含む): 63866880

約数和(自身を除く): 42857940

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 17, 20, 30, 34, 43, 51, 60, 68, 85, 86, 102, 129, 170, 172, 204, 215, 255, 258, 340, 430, 479, 510, 516, 645, 731, 860, 958, 1020, 1290, 1437, 1462, 1916, 2193, 2395, 2580, 2874, 2924, 3655, 4386, 4790, 5748, 7185, 7310, 8143, 8772, 9580, 10965, 14370, 14620, 16286, 20597, 21930, 24429, 28740, 32572, 40715, 41194, 43860, 48858, 61791, 81430, 82388, 97716, 102985, 122145, 123582, 162860, 205970, 244290, 247164, 308955, 350149, 411940, 488580, 617910, 700298, 1050447, 1235820, 1400596, 1750745, 2100894, 3501490, 4201788, 5252235, 7002980, 10504470, 21008940]

約数ペア:

[(1, 21008940), (2, 10504470), (3, 7002980), (4, 5252235), (5, 4201788), (6, 3501490), (10, 2100894), (12, 1750745), (15, 1400596), (17, 1235820), (20, 1050447), (30, 700298), (34, 617910), (43, 488580), (51, 411940), (60, 350149), (68, 308955), (85, 247164), (86, 244290), (102, 205970), (129, 162860), (170, 123582), (172, 122145), (204, 102985), (215, 97716), (255, 82388), (258, 81430), (340, 61791), (430, 48858), (479, 43860), (510, 41194), (516, 40715), (645, 32572), (731, 28740), (860, 24429), (958, 21930), (1020, 20597), (1290, 16286), (1437, 14620), (1462, 14370), (1916, 10965), (2193, 9580), (2395, 8772), (2580, 8143), (2874, 7310), (2924, 7185), (3655, 5748), (4386, 4790)]