20510840

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{139}}^1$

素因数の和:205

約数の個数: 128

約数和(自身を含む): 58060800

約数和(自身を除く): 37549960

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 17, 20, 28, 31, 34, 35, 40, 56, 62, 68, 70, 85, 119, 124, 136, 139, 140, 155, 170, 217, 238, 248, 278, 280, 310, 340, 434, 476, 527, 556, 595, 620, 680, 695, 868, 952, 973, 1054, 1085, 1112, 1190, 1240, 1390, 1736, 1946, 2108, 2170, 2363, 2380, 2635, 2780, 3689, 3892, 4216, 4309, 4340, 4726, 4760, 4865, 5270, 5560, 7378, 7784, 8618, 8680, 9452, 9730, 10540, 11815, 14756, 16541, 17236, 18445, 18904, 19460, 21080, 21545, 23630, 29512, 30163, 33082, 34472, 36890, 38920, 43090, 47260, 60326, 66164, 73253, 73780, 82705, 86180, 94520, 120652, 132328, 146506, 147560, 150815, 165410, 172360, 241304, 293012, 301630, 330820, 366265, 512771, 586024, 603260, 661640, 732530, 1025542, 1206520, 1465060, 2051084, 2563855, 2930120, 4102168, 5127710, 10255420, 20510840]

約数ペア:

[(1, 20510840), (2, 10255420), (4, 5127710), (5, 4102168), (7, 2930120), (8, 2563855), (10, 2051084), (14, 1465060), (17, 1206520), (20, 1025542), (28, 732530), (31, 661640), (34, 603260), (35, 586024), (40, 512771), (56, 366265), (62, 330820), (68, 301630), (70, 293012), (85, 241304), (119, 172360), (124, 165410), (136, 150815), (139, 147560), (140, 146506), (155, 132328), (170, 120652), (217, 94520), (238, 86180), (248, 82705), (278, 73780), (280, 73253), (310, 66164), (340, 60326), (434, 47260), (476, 43090), (527, 38920), (556, 36890), (595, 34472), (620, 33082), (680, 30163), (695, 29512), (868, 23630), (952, 21545), (973, 21080), (1054, 19460), (1085, 18904), (1112, 18445), (1190, 17236), (1240, 16541), (1390, 14756), (1736, 11815), (1946, 10540), (2108, 9730), (2170, 9452), (2363, 8680), (2380, 8618), (2635, 7784), (2780, 7378), (3689, 5560), (3892, 5270), (4216, 4865), (4309, 4760), (4340, 4726)]