19941680

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1$

素因数の和:115

約数の個数: 160

約数和(自身を含む): 56567808

約数和(自身を除く): 36626128

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 17, 20, 22, 31, 34, 40, 43, 44, 55, 62, 68, 80, 85, 86, 88, 110, 124, 136, 155, 170, 172, 176, 187, 215, 220, 248, 272, 310, 340, 341, 344, 374, 430, 440, 473, 496, 527, 620, 680, 682, 688, 731, 748, 860, 880, 935, 946, 1054, 1240, 1333, 1360, 1364, 1462, 1496, 1705, 1720, 1870, 1892, 2108, 2365, 2480, 2635, 2666, 2728, 2924, 2992, 3410, 3440, 3655, 3740, 3784, 4216, 4730, 5270, 5332, 5456, 5797, 5848, 6665, 6820, 7310, 7480, 7568, 8041, 8432, 9460, 10540, 10664, 11594, 11696, 13330, 13640, 14620, 14663, 14960, 16082, 18920, 21080, 21328, 22661, 23188, 26660, 27280, 28985, 29240, 29326, 32164, 37840, 40205, 42160, 45322, 46376, 53320, 57970, 58480, 58652, 64328, 73315, 80410, 90644, 92752, 106640, 113305, 115940, 117304, 128656, 146630, 160820, 181288, 226610, 231880, 234608, 249271, 293260, 321640, 362576, 453220, 463760, 498542, 586520, 643280, 906440, 997084, 1173040, 1246355, 1812880, 1994168, 2492710, 3988336, 4985420, 9970840, 19941680]

約数ペア:

[(1, 19941680), (2, 9970840), (4, 4985420), (5, 3988336), (8, 2492710), (10, 1994168), (11, 1812880), (16, 1246355), (17, 1173040), (20, 997084), (22, 906440), (31, 643280), (34, 586520), (40, 498542), (43, 463760), (44, 453220), (55, 362576), (62, 321640), (68, 293260), (80, 249271), (85, 234608), (86, 231880), (88, 226610), (110, 181288), (124, 160820), (136, 146630), (155, 128656), (170, 117304), (172, 115940), (176, 113305), (187, 106640), (215, 92752), (220, 90644), (248, 80410), (272, 73315), (310, 64328), (340, 58652), (341, 58480), (344, 57970), (374, 53320), (430, 46376), (440, 45322), (473, 42160), (496, 40205), (527, 37840), (620, 32164), (680, 29326), (682, 29240), (688, 28985), (731, 27280), (748, 26660), (860, 23188), (880, 22661), (935, 21328), (946, 21080), (1054, 18920), (1240, 16082), (1333, 14960), (1360, 14663), (1364, 14620), (1462, 13640), (1496, 13330), (1705, 11696), (1720, 11594), (1870, 10664), (1892, 10540), (2108, 9460), (2365, 8432), (2480, 8041), (2635, 7568), (2666, 7480), (2728, 7310), (2924, 6820), (2992, 6665), (3410, 5848), (3440, 5797), (3655, 5456), (3740, 5332), (3784, 5270), (4216, 4730)]