20201728

素因数分解:

$2^8\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{73}}^1$

素因数の和:159

約数の個数: 72

約数和(自身を含む): 43561728

約数和(自身を除く): 23360000

約数列:

[1, 2, 4, 8, 16, 23, 32, 46, 47, 64, 73, 92, 94, 128, 146, 184, 188, 256, 292, 368, 376, 584, 736, 752, 1081, 1168, 1472, 1504, 1679, 2162, 2336, 2944, 3008, 3358, 3431, 4324, 4672, 5888, 6016, 6716, 6862, 8648, 9344, 12032, 13432, 13724, 17296, 18688, 26864, 27448, 34592, 53728, 54896, 69184, 78913, 107456, 109792, 138368, 157826, 214912, 219584, 276736, 315652, 429824, 439168, 631304, 878336, 1262608, 2525216, 5050432, 10100864, 20201728]

約数ペア:

[(1, 20201728), (2, 10100864), (4, 5050432), (8, 2525216), (16, 1262608), (23, 878336), (32, 631304), (46, 439168), (47, 429824), (64, 315652), (73, 276736), (92, 219584), (94, 214912), (128, 157826), (146, 138368), (184, 109792), (188, 107456), (256, 78913), (292, 69184), (368, 54896), (376, 53728), (584, 34592), (736, 27448), (752, 26864), (1081, 18688), (1168, 17296), (1472, 13724), (1504, 13432), (1679, 12032), (2162, 9344), (2336, 8648), (2944, 6862), (3008, 6716), (3358, 6016), (3431, 5888), (4324, 4672)]