161878255

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{101}}^1\times {\mathrm{181}}^1$

素因数の和:328

約数の個数: 64

約数和(自身を含む): 256628736

約数和(自身を除く): 94750481

約数列:

[1, 5, 7, 11, 23, 35, 55, 77, 101, 115, 161, 181, 253, 385, 505, 707, 805, 905, 1111, 1265, 1267, 1771, 1991, 2323, 3535, 4163, 5555, 6335, 7777, 8855, 9955, 11615, 13937, 16261, 18281, 20815, 25553, 29141, 38885, 45793, 69685, 81305, 91405, 127765, 127967, 145705, 178871, 201091, 228965, 320551, 420463, 639835, 894355, 1005455, 1407637, 1602755, 2102315, 2943241, 4625093, 7038185, 14716205, 23125465, 32375651, 161878255]

約数ペア:

[(1, 161878255), (5, 32375651), (7, 23125465), (11, 14716205), (23, 7038185), (35, 4625093), (55, 2943241), (77, 2102315), (101, 1602755), (115, 1407637), (161, 1005455), (181, 894355), (253, 639835), (385, 420463), (505, 320551), (707, 228965), (805, 201091), (905, 178871), (1111, 145705), (1265, 127967), (1267, 127765), (1771, 91405), (1991, 81305), (2323, 69685), (3535, 45793), (4163, 38885), (5555, 29141), (6335, 25553), (7777, 20815), (8855, 18281), (9955, 16261), (11615, 13937)]