161945980

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{257}}^1\times {\mathrm{643}}^1$

素因数の和:923

約数の個数: 72

約数和(自身を含む): 397767888

約数和(自身を除く): 235821908

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 257, 490, 514, 643, 980, 1028, 1285, 1286, 1799, 2570, 2572, 3215, 3598, 4501, 5140, 6430, 7196, 8995, 9002, 12593, 12860, 17990, 18004, 22505, 25186, 31507, 35980, 45010, 50372, 62965, 63014, 90020, 125930, 126028, 157535, 165251, 251860, 315070, 330502, 630140, 661004, 826255, 1156757, 1652510, 2313514, 3305020, 4627028, 5783785, 8097299, 11567570, 16194598, 23135140, 32389196, 40486495, 80972990, 161945980]

約数ペア:

[(1, 161945980), (2, 80972990), (4, 40486495), (5, 32389196), (7, 23135140), (10, 16194598), (14, 11567570), (20, 8097299), (28, 5783785), (35, 4627028), (49, 3305020), (70, 2313514), (98, 1652510), (140, 1156757), (196, 826255), (245, 661004), (257, 630140), (490, 330502), (514, 315070), (643, 251860), (980, 165251), (1028, 157535), (1285, 126028), (1286, 125930), (1799, 90020), (2570, 63014), (2572, 62965), (3215, 50372), (3598, 45010), (4501, 35980), (5140, 31507), (6430, 25186), (7196, 22505), (8995, 18004), (9002, 17990), (12593, 12860)]