20971212

素因数分解:

$2^2\times 3^1\times {\mathrm{19}}^2\times {\mathrm{47}}^1\times {\mathrm{103}}^1$

素因数の和:195

約数の個数: 72

約数和(自身を含む): 53254656

約数和(自身を除く): 32283444

約数列:

[1, 2, 3, 4, 6, 12, 19, 38, 47, 57, 76, 94, 103, 114, 141, 188, 206, 228, 282, 309, 361, 412, 564, 618, 722, 893, 1083, 1236, 1444, 1786, 1957, 2166, 2679, 3572, 3914, 4332, 4841, 5358, 5871, 7828, 9682, 10716, 11742, 14523, 16967, 19364, 23484, 29046, 33934, 37183, 50901, 58092, 67868, 74366, 91979, 101802, 111549, 148732, 183958, 203604, 223098, 275937, 367916, 446196, 551874, 1103748, 1747601, 3495202, 5242803, 6990404, 10485606, 20971212]

約数ペア:

[(1, 20971212), (2, 10485606), (3, 6990404), (4, 5242803), (6, 3495202), (12, 1747601), (19, 1103748), (38, 551874), (47, 446196), (57, 367916), (76, 275937), (94, 223098), (103, 203604), (114, 183958), (141, 148732), (188, 111549), (206, 101802), (228, 91979), (282, 74366), (309, 67868), (361, 58092), (412, 50901), (564, 37183), (618, 33934), (722, 29046), (893, 23484), (1083, 19364), (1236, 16967), (1444, 14523), (1786, 11742), (1957, 10716), (2166, 9682), (2679, 7828), (3572, 5871), (3914, 5358), (4332, 4841)]