20905740

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1$

素因数の和:168

約数の個数: 144

約数和(自身を含む): 67555488

約数和(自身を除く): 46649748

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 37, 43, 45, 60, 73, 74, 86, 90, 111, 129, 146, 148, 172, 180, 185, 215, 219, 222, 258, 292, 333, 365, 370, 387, 430, 438, 444, 516, 555, 645, 657, 666, 730, 740, 774, 860, 876, 1095, 1110, 1290, 1314, 1332, 1460, 1548, 1591, 1665, 1935, 2190, 2220, 2580, 2628, 2701, 3139, 3182, 3285, 3330, 3870, 4380, 4773, 5402, 6278, 6364, 6570, 6660, 7740, 7955, 8103, 9417, 9546, 10804, 12556, 13140, 13505, 14319, 15695, 15910, 16206, 18834, 19092, 23865, 24309, 27010, 28251, 28638, 31390, 31820, 32412, 37668, 40515, 47085, 47730, 48618, 54020, 56502, 57276, 62780, 71595, 81030, 94170, 95460, 97236, 113004, 116143, 121545, 141255, 143190, 162060, 188340, 232286, 243090, 282510, 286380, 348429, 464572, 486180, 565020, 580715, 696858, 1045287, 1161430, 1393716, 1742145, 2090574, 2322860, 3484290, 4181148, 5226435, 6968580, 10452870, 20905740]

約数ペア:

[(1, 20905740), (2, 10452870), (3, 6968580), (4, 5226435), (5, 4181148), (6, 3484290), (9, 2322860), (10, 2090574), (12, 1742145), (15, 1393716), (18, 1161430), (20, 1045287), (30, 696858), (36, 580715), (37, 565020), (43, 486180), (45, 464572), (60, 348429), (73, 286380), (74, 282510), (86, 243090), (90, 232286), (111, 188340), (129, 162060), (146, 143190), (148, 141255), (172, 121545), (180, 116143), (185, 113004), (215, 97236), (219, 95460), (222, 94170), (258, 81030), (292, 71595), (333, 62780), (365, 57276), (370, 56502), (387, 54020), (430, 48618), (438, 47730), (444, 47085), (516, 40515), (555, 37668), (645, 32412), (657, 31820), (666, 31390), (730, 28638), (740, 28251), (774, 27010), (860, 24309), (876, 23865), (1095, 19092), (1110, 18834), (1290, 16206), (1314, 15910), (1332, 15695), (1460, 14319), (1548, 13505), (1591, 13140), (1665, 12556), (1935, 10804), (2190, 9546), (2220, 9417), (2580, 8103), (2628, 7955), (2701, 7740), (3139, 6660), (3182, 6570), (3285, 6364), (3330, 6278), (3870, 5402), (4380, 4773)]