21398636

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^2\times {\mathrm{29}}^1\times {\mathrm{73}}^1$

素因数の和:151

約数の個数: 72

約数和(自身を含む): 47365920

約数和(自身を除く): 25967284

約数列:

[1, 2, 4, 7, 14, 19, 28, 29, 38, 58, 73, 76, 116, 133, 146, 203, 266, 292, 361, 406, 511, 532, 551, 722, 812, 1022, 1102, 1387, 1444, 2044, 2117, 2204, 2527, 2774, 3857, 4234, 5054, 5548, 7714, 8468, 9709, 10108, 10469, 14819, 15428, 19418, 20938, 26353, 29638, 38836, 40223, 41876, 52706, 59276, 73283, 80446, 105412, 146566, 160892, 184471, 281561, 293132, 368942, 563122, 737884, 764237, 1126244, 1528474, 3056948, 5349659, 10699318, 21398636]

約数ペア:

[(1, 21398636), (2, 10699318), (4, 5349659), (7, 3056948), (14, 1528474), (19, 1126244), (28, 764237), (29, 737884), (38, 563122), (58, 368942), (73, 293132), (76, 281561), (116, 184471), (133, 160892), (146, 146566), (203, 105412), (266, 80446), (292, 73283), (361, 59276), (406, 52706), (511, 41876), (532, 40223), (551, 38836), (722, 29638), (812, 26353), (1022, 20938), (1102, 19418), (1387, 15428), (1444, 14819), (2044, 10469), (2117, 10108), (2204, 9709), (2527, 8468), (2774, 7714), (3857, 5548), (4234, 5054)]